improve initial config

docker-compose.yml

@@ -3,12 +3,12 @@ services:
 
     db:
       image: postgres:12
-      container_name: docker-sf5-postgres
       volumes:
-        #- ./data:/var/lib/postgresql/data
+        # comment to keep data in docker volumes
+        - ./data:/var/lib/postgresql/data
         - ./docker_build/db/docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d
       environment:
-        - "POSTGRES_USER=admin"
+        - "POSTGRES_USER=postgres"
         - "POSTGRES_PASSWORD=secret"
         - "POSTGRES_DB=postgres"
       ports:
@@ -16,7 +16,6 @@ services:
 
     nginx:
       image: nginx:latest
-      container_name: docker-sf5-nginx
       working_dir: /var/www/app
       volumes:
           - ./app:/var/www/app
@@ -29,7 +28,6 @@ services:
         context: ./docker_build/php
         args:
           UID: 1000
-      container_name: docker-sf5-php
       image: php-fpm_sf5:latest
       working_dir: /var/www/app
       volumes: