add new demo symfony files

app/config/bundles.php

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+<?php
+
+return [
+    Symfony\Bundle\FrameworkBundle\FrameworkBundle::class => ['all' => true],
+    Symfony\Bundle\SecurityBundle\SecurityBundle::class => ['all' => true],
+    Doctrine\Bundle\DoctrineBundle\DoctrineBundle::class => ['all' => true],
+    Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle::class => ['all' => true],
+    Symfony\Bundle\MonologBundle\MonologBundle::class => ['all' => true],
+    Symfony\Bundle\TwigBundle\TwigBundle::class => ['all' => true],
+    Symfony\Bundle\DebugBundle\DebugBundle::class => ['dev' => true, 'test' => true],
+    Symfony\Bundle\WebProfilerBundle\WebProfilerBundle::class => ['dev' => true, 'test' => true],
+    DAMA\DoctrineTestBundle\DAMADoctrineTestBundle::class => ['test' => true],
+    Doctrine\Bundle\MigrationsBundle\DoctrineMigrationsBundle::class => ['all' => true],
+    Doctrine\Bundle\FixturesBundle\DoctrineFixturesBundle::class => ['dev' => true, 'test' => true],
+    Symfony\WebpackEncoreBundle\WebpackEncoreBundle::class => ['all' => true],
+    Symfony\Bundle\MakerBundle\MakerBundle::class => ['dev' => true],
+    Twig\Extra\TwigExtraBundle\TwigExtraBundle::class => ['all' => true],
+    HtmlSanitizer\Bundle\HtmlSanitizerBundle::class => ['all' => true],
+];

app/config/packages/assets.yaml

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+framework:
+    assets:
+        json_manifest_path: '%kernel.project_dir%/public/build/manifest.json'

app/config/packages/cache.yaml

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+framework:
+    cache:
+        # Unique name of your app: used to compute stable namespaces for cache keys.
+        #prefix_seed: your_vendor_name/app_name
+
+        # The "app" cache stores to the filesystem by default.
+        # The data in this cache should persist between deploys.
+        # Other options include:
+
+        # Redis
+        #app: cache.adapter.redis
+        #default_redis_provider: redis://localhost
+
+        # APCu (not recommended with heavy random-write workloads as memory fragmentation can cause perf issues)
+        #app: cache.adapter.apcu
+
+        # Namespaced pools use the above "app" backend by default
+        #pools:
+            #my.dedicated.cache: null

app/config/packages/dev/debug.yaml

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+debug:
+    # Forwards VarDumper Data clones to a centralized server allowing to inspect dumps on CLI or in your browser.
+    # See the "server:dump" command to start a new server.
+    dump_destination: "tcp://%env(VAR_DUMPER_SERVER)%"

app/config/packages/dev/mailer.yaml

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+framework:
+    mailer:
+        # this disables delivery of messages entirely
+        dsn: 'null://null'

app/config/packages/dev/monolog.yaml

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+monolog:
+    handlers:
+        main:
+            type: stream
+            path: "%kernel.logs_dir%/%kernel.environment%.log"
+            level: debug
+            channels: ["!event"]
+        # uncomment to get logging in your browser
+        # you may have to allow bigger header sizes in your Web server configuration
+        #firephp:
+        #    type: firephp
+        #    level: info
+        #chromephp:
+        #    type: chromephp
+        #    level: info
+        console:
+            type: console
+            process_psr_3_messages: false
+            channels: ["!event", "!doctrine", "!console"]

app/config/packages/dev/web_profiler.yaml

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+web_profiler:
+    toolbar: true
+    intercept_redirects: false
+
+framework:
+    profiler: { only_exceptions: false }

app/config/packages/doctrine.yaml

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+doctrine:
+    dbal:
+        url: '%env(resolve:DATABASE_URL)%'
+
+        # IMPORTANT: You MUST configure your server version,
+        # either here or in the DATABASE_URL env var (see .env file)
+        #server_version: '5.7'
+    orm:
+        auto_generate_proxy_classes: true
+        naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware
+        auto_mapping: true
+        mappings:
+            App:
+                is_bundle: false
+                type: annotation
+                dir: '%kernel.project_dir%/src/Entity'
+                prefix: 'App\Entity'
+                alias: App

app/config/packages/doctrine_migrations.yaml

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+doctrine_migrations:
+    migrations_paths:
+        # namespace is arbitrary but should be different from App\Migrations
+        # as migrations classes should NOT be autoloaded
+        'DoctrineMigrations': '%kernel.project_dir%/migrations'

app/config/packages/framework.yaml

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+# see https://symfony.com/doc/current/reference/configuration/framework.html
+framework:
+    secret: '%env(APP_SECRET)%'
+    csrf_protection: true
+    http_method_override: true
+
+    # Enables session support. Note that the session will ONLY be started if you read or write from it.
+    # Remove or comment this section to explicitly disable session support.
+    session:
+        handler_id: null
+        cookie_secure: auto
+        cookie_samesite: lax
+
+    # When using the HTTP Cache, ESI allows to render page fragments separately
+    # and with different cache configurations for each fragment
+    # https://symfony.com/doc/current/http_cache/esi.html
+    esi: true
+    fragments: true
+
+    php_errors:
+        log: true
+
+    # The 'ide' option turns all of the file paths in an exception page
+    # into clickable links that open the given file using your favorite IDE.
+    # When 'ide' is set to null the file is opened in your web browser.
+    # See https://symfony.com/doc/current/reference/configuration/framework.html#ide
+    ide: null

app/config/packages/html_sanitizer.yaml

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+html_sanitizer:
+    default_sanitizer: 'default'
+    sanitizers:
+        default:
+            # Read https://github.com/tgalopin/html-sanitizer/blob/master/docs/1-getting-started.md#extensions
+            # to learn more about which extensions you would like to enable.
+            extensions:
+                - 'basic'
+                - 'list'
+                - 'table'
+                - 'image'
+                - 'code'
+                # - 'iframe'
+                # - 'extra'
+
+            # Read https://github.com/tgalopin/html-sanitizer/blob/master/docs/3-configuration-reference.md
+            # to discover all the available options for each extension.

app/config/packages/mailer.yaml

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+framework:
+    mailer:
+        dsn: '%env(MAILER_DSN)%'

app/config/packages/prod/deprecations.yaml

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+# As of Symfony 5.1, deprecations are logged in the dedicated "deprecation" channel when it exists
+#monolog:
+#    channels: [deprecation]
+#    handlers:
+#        deprecation:
+#            type: stream
+#            channels: [deprecation]
+#            path: "%kernel.logs_dir%/%kernel.environment%.deprecations.log"

app/config/packages/prod/doctrine.yaml

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+doctrine:
+    orm:
+        auto_generate_proxy_classes: false
+        metadata_cache_driver:
+            type: pool
+            pool: doctrine.system_cache_pool
+        query_cache_driver:
+            type: pool
+            pool: doctrine.system_cache_pool
+        result_cache_driver:
+            type: pool
+            pool: doctrine.result_cache_pool
+
+framework:
+    cache:
+        pools:
+            doctrine.result_cache_pool:
+                adapter: cache.app
+            doctrine.system_cache_pool:
+                adapter: cache.system

app/config/packages/prod/monolog.yaml

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+monolog:
+    handlers:
+        main:
+            type: fingers_crossed
+            action_level: error
+            handler: nested
+            excluded_http_codes: [404, 405]
+            buffer_size: 50 # How many messages should be saved? Prevent memory leaks
+        nested:
+            type: stream
+            path: "%kernel.logs_dir%/%kernel.environment%.log"
+            level: debug
+        console:
+            type: console
+            process_psr_3_messages: false
+            channels: ["!event", "!doctrine"]

app/config/packages/prod/routing.yaml

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+framework:
+    router:
+        strict_requirements: null

app/config/packages/prod/webpack_encore.yaml

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+#webpack_encore:
+    # Cache the entrypoints.json (rebuild Symfony's cache when entrypoints.json changes)
+    # Available in version 1.2
+    #cache: true

app/config/packages/routing.yaml

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+framework:
+    router:
+        utf8: true
+
+        # Configure how to generate URLs in non-HTTP contexts, such as CLI commands.
+        # See https://symfony.com/doc/current/routing.html#generating-urls-in-commands
+        #default_uri: http://localhost

app/config/packages/security.yaml

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+security:
+    encoders:
+        # Our user class and the algorithm we'll use to encode passwords
+        # 'auto' means to let Symfony choose the best possible password hasher (Argon2 or Bcrypt)
+        # https://symfony.com/doc/current/security.html#c-encoding-passwords
+        App\Entity\User: 'auto'
+
+    providers:
+        # https://symfony.com/doc/current/security/user_provider.html
+        # In this example, users are stored via Doctrine in the database
+        # To see the users at src/App/DataFixtures/ORM/LoadFixtures.php
+        # To load users from somewhere else: https://symfony.com/doc/current/security/user_provider.html#creating-a-custom-user-provider
+        database_users:
+            entity: { class: App\Entity\User, property: username }
+
+    # https://symfony.com/doc/current/security.html#a-authentication-firewalls
+    firewalls:
+        dev:
+            pattern: ^/(_(profiler|wdt)|css|images|js)/
+            security: false
+
+        main:
+            # this firewall applies to all URLs
+            pattern: ^/
+
+            # but the firewall does not require login on every page
+            # denying access is done in access_control or in your controllers
+            anonymous: true
+            lazy: true
+
+            # The user provider to use.
+            provider: database_users
+
+            # This allows the user to login by submitting a username and password
+            # Reference: https://symfony.com/doc/current/security/form_login_setup.html
+            form_login:
+                # The route name that the login form submits to
+                check_path: security_login
+                # The name of the route where the login form lives
+                # When the user tries to access a protected page, they are redirected here
+                login_path: security_login
+                # Secure the login form against CSRF
+                # Reference: https://symfony.com/doc/current/security/csrf.html#csrf-protection-in-login-forms
+                csrf_token_generator: security.csrf.token_manager
+                # The page users are redirect to when there is no previous page stored in the
+                # session (for example when the users access directly to the login page).
+                default_target_path: blog_index
+
+            logout:
+                # The route name the user can go to in order to logout
+                path: security_logout
+                # The name of the route to redirect to after logging out
+                target: homepage
+
+    # Easy way to control access for large sections of your site
+    # Note: Only the *first* access control that matches will be used
+    access_control:
+        # this is a catch-all for the admin area
+        # additional security lives in the controllers
+        - { path: '^/(%app_locales%)/admin', roles: ROLE_ADMIN }
+
+    role_hierarchy:
+        ROLE_ADMIN: ROLE_USER

app/config/packages/sensio_framework_extra.yaml

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+sensio_framework_extra:
+    router:
+        annotations: false

app/config/packages/test/dama_doctrine_test_bundle.yaml

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+dama_doctrine_test:
+    enable_static_connection: true
+    enable_static_meta_data_cache: true
+    enable_static_query_cache: true

app/config/packages/test/framework.yaml

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+framework:
+    test: true
+    session:
+        storage_id: session.storage.mock_file

app/config/packages/test/mailer.yaml

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+framework:
+    mailer:
+        # this disables delivery of messages entirely
+        dsn: 'null://null'

app/config/packages/test/monolog.yaml

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+monolog:
+    handlers:
+        main:
+            type: fingers_crossed
+            action_level: error
+            handler: nested
+            excluded_http_codes: [404, 405]
+            channels: ["!event"]
+        nested:
+            type: stream
+            path: "%kernel.logs_dir%/%kernel.environment%.log"
+            level: debug

app/config/packages/test/security.yaml

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+# this configuration simplifies testing URLs protected by the security mechanism
+# See https://symfony.com/doc/current/testing/http_authentication.html
+security:
+    firewalls:
+        main:
+            http_basic: ~

app/config/packages/test/twig.yaml

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+twig:
+    strict_variables: true

app/config/packages/test/validator.yaml

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+framework:
+    validation:
+        not_compromised_password: false

app/config/packages/test/web_profiler.yaml

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+web_profiler:
+    toolbar: false
+    intercept_redirects: false
+
+framework:
+    profiler: { collect: false }

app/config/packages/test/webpack_encore.yaml

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+#webpack_encore:
+#    strict_mode: false

app/config/packages/translation.yaml

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+framework:
+    default_locale: '%locale%'
+    translator:
+        default_path: '%kernel.project_dir%/translations'
+        fallbacks:
+            - '%locale%'

app/config/packages/twig.yaml

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+twig:
+    default_path: '%kernel.project_dir%/templates'
+    form_themes:
+        - 'form/layout.html.twig'
+        - 'form/fields.html.twig'

app/config/packages/validator.yaml

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+framework:
+    validation:
+        enable_annotations: true
+        email_validation_mode: html5
+
+        # Enables validator auto-mapping support.
+        # For instance, basic validation constraints will be inferred from Doctrine's metadata.
+        auto_mapping:
+           App\Entity\: []

app/config/packages/webpack_encore.yaml

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+webpack_encore:
+    # The path where Encore is building the assets - i.e. Encore.setOutputPath()
+    output_path: '%kernel.project_dir%/public/build'
+    # If multiple builds are defined (as shown below), you can disable the default build:
+    # output_path: false
+
+    # if using Encore.enableIntegrityHashes() and need the crossorigin attribute (default: false, or use 'anonymous' or 'use-credentials')
+    # crossorigin: 'anonymous'
+
+    # preload all rendered script and link tags automatically via the http2 Link header
+    # preload: true
+
+    # Throw an exception if the entrypoints.json file is missing or an entry is missing from the data
+    # strict_mode: false
+
+    # if you have multiple builds:
+    # builds:
+        # pass "frontend" as the 3rg arg to the Twig functions
+        # {{ encore_entry_script_tags('entry1', null, 'frontend') }}
+
+        # frontend: '%kernel.project_dir%/public/frontend/build'
+
+    # Cache the entrypoints.json (rebuild Symfony's cache when entrypoints.json changes)
+    # Put in config/packages/prod/webpack_encore.yaml
+    # cache: true

app/config/preload.php

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+<?php
+
+if (file_exists(dirname(__DIR__).'/var/cache/prod/App_KernelProdContainer.preload.php')) {
+    require dirname(__DIR__).'/var/cache/prod/App_KernelProdContainer.preload.php';
+}

app/config/routes.yaml

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+# These lines define a route using YAML configuration. The controller used by
+# the route (FrameworkBundle:Template:template) is a convenient shortcut when
+# the template can be rendered without executing any logic in your own controller.
+# See https://symfony.com/doc/current/templates.html#rendering-a-template-directly-from-a-route
+homepage:
+    path: /{_locale}
+    controller: Symfony\Bundle\FrameworkBundle\Controller\TemplateController::templateAction
+    requirements:
+        _locale: '%app_locales%'
+    defaults:
+        template: default/homepage.html.twig
+        _locale: '%locale%'

app/config/routes/annotations.yaml

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+controllers:
+    resource: '../../src/Controller/'
+    type: annotation
+    prefix: /{_locale}
+    requirements:
+        _locale: '%app_locales%'
+    defaults:
+        _locale: '%locale%'

app/config/routes/dev/framework.yaml

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+_errors:
+    resource: '@FrameworkBundle/Resources/config/routing/errors.xml'
+    prefix: /_error

app/config/routes/dev/web_profiler.yaml

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+web_profiler_wdt:
+    resource: '@WebProfilerBundle/Resources/config/routing/wdt.xml'
+    prefix: /_wdt
+
+web_profiler_profiler:
+    resource: '@WebProfilerBundle/Resources/config/routing/profiler.xml'
+    prefix: /_profiler

app/config/services.yaml

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+# This file is the entry point to configure your own services.
+# Files in the packages/ subdirectory configure your dependencies.
+
+# Put parameters here that don't need to change on each machine where the app is deployed
+# https://symfony.com/doc/current/best_practices/configuration.html#application-related-configuration
+parameters:
+    locale: 'en'
+    # This parameter defines the codes of the locales (languages) enabled in the application
+    app_locales: ar|en|fr|de|es|cs|nl|ru|uk|ro|pt_BR|pl|it|ja|id|ca|sl|hr|zh_CN|bg|tr|lt
+    app.notifications.email_sender: anonymous@example.com
+
+services:
+    # default configuration for services in *this* file
+    _defaults:
+        autowire: true      # Automatically injects dependencies in your services.
+        autoconfigure: true # Automatically registers your services as commands, event subscribers, etc.
+        bind:               # defines the scalar arguments once and apply them to any service defined/created in this file
+            string $locales: '%app_locales%'
+            string $defaultLocale: '%locale%'
+            string $emailSender: '%app.notifications.email_sender%'
+
+    # makes classes in src/ available to be used as services
+    # this creates a service per class whose id is the fully-qualified class name
+    App\:
+        resource: '../src/'
+        exclude:
+            - '../src/DependencyInjection/'
+            - '../src/Entity/'
+            - '../src/Kernel.php'
+            - '../src/Tests/'
+
+    # controllers are imported separately to make sure services can be injected
+    # as action arguments even if you don't extend any base controller class
+    App\Controller\:
+        resource: '../src/Controller/'
+        tags: ['controller.service_arguments']
+
+    # when the service definition only contains arguments, you can omit the
+    # 'arguments' key and define the arguments just below the service class
+    App\EventSubscriber\CommentNotificationSubscriber:
+        $sender: '%app.notifications.email_sender%'