feat: split dev and prod docker-compose files

Dockerfile

@@ -74,9 +74,6 @@ ENV PATH="${PATH}:/root/.composer/vendor/bin"
 
 WORKDIR /srv/app
 
-# build for production
-ARG APP_ENV=prod
-
 # Allow to use development versions of Symfony
 ARG STABILITY="stable"
 ENV STABILITY ${STABILITY:-stable}