Fix language switche, adapt contact form and add gitea action.

.env.template

@@ -1,11 +1 @@
-# Configuration SMTP pour contact-backend.js
-BASE_URL=http://localhost
-SMTP_HOST=HOST
-SMTP_PORT=PORT
-SMTP_SECURE=false
-SMTP_USER=USER
-SMTP_FROM=FROM
-SMTP_PASS=PASSWORD
-PORT=PORT
-
-
+CONTACT_FORM_URL="http://localhost:1314/contact.php"