Use docker extensions for env variables

docker-compose.development.yml

@@ -5,13 +5,9 @@ volumes:
   node-modules:
 
 services:
-  db:
-    env_file: ./.development.env
-
   celery:
     build:
       target: development
-    env_file: ./.development.env
     volumes:
       - ./src/:/app/src
 
@@ -19,7 +15,6 @@ services:
     build:
       target: development
     command: python /app/src/manage.py runserver 0.0.0.0:8000
-    env_file: ./.development.env
     ports:
       - "${DJANGO_PORT:-8000}:8000"
     volumes:

docker-compose.production.yml

@@ -5,21 +5,11 @@ volumes:
   static-files:
 
 services:
-  db:
-    env_file: ./.production.env
-
-  celery:
-    env_file: ./.production.env
-
-  django:
-    env_file: ./.production.env
-
   nginx:
     image: nginx:1.23
     depends_on:
       django:
         condition: service_healthy
-    env_file: ./.production.env
     ports:
       # Note that --env-file should be used to set these correctly
       - "${NGINX_HTTP_PORT:-80}:80"

docker-compose.yml

@@ -6,8 +6,22 @@ volumes:
   postgres-data:
   static-files:
 
+x-db-env: &db-env
+  POSTGRES_HOST:
+  POSTGRES_PORT:
+  POSTGRES_DB:
+  POSTGRES_USER:
+  POSTGRES_PASSWORD:
+
+x-django-env: &django-env
+  <<: *db-env
+  DJANGO_SECRET_KEY:
+  DJANGO_SETTINGS_MODULE:
+
 services:
   db:
+    environment:
+      <<: *db-env
     image: postgres:15
     healthcheck:
       # Note that --env-file should be used to set these correctly
@@ -33,13 +47,9 @@ services:
       dockerfile: ./docker/django
       target: production
       args:
-        POSTGRES_HOST:
+        <<: *django-env
-        POSTGRES_PORT:
+    environment:
-        POSTGRES_DB:
+      <<: *django-env
-        POSTGRES_USER:
-        POSTGRES_PASSWORD:
-        DJANGO_SECRET_KEY:
-        DJANGO_SETTINGS_MODULE:
     command: |
       celery worker -n worker1@%h
       -n worker2@%h
@@ -67,13 +77,9 @@ services:
       dockerfile: ./docker/django
       target: production
       args:
-        POSTGRES_HOST:
+        <<: *django-env
-        POSTGRES_PORT:
+    environment:
-        POSTGRES_DB:
+        <<: *django-env
-        POSTGRES_USER:
-        POSTGRES_PASSWORD:
-        DJANGO_SECRET_KEY:
-        DJANGO_SETTINGS_MODULE:
     entrypoint: /app/bin/docker-entrypoint.sh
     command: |
       gunicorn --bind 0.0.0.0:8000