added database healthcheck, removed old test profile, implemented network segregation for containers.

compose.yaml

@@ -3,11 +3,11 @@ services:
     build: .
     command: gunicorn website.wsgi:application
     depends_on:
-      - db
+      db:
+        condition: service_healthy
+
     environment:
       ALLOWED_HOSTS: ${NGINX_HOSTNAME}
-      PYTHONDONTWRITEBYTECODE: 1
-      PYTHONUNBUFFERED: 1
       DJANGO_SETTINGS_MODULE: ${DJANGO_SETTINGS_MODULE}
       VIRTUAL_HOST: localhost
       #VIRTUAL_PORT: 8000
@@ -15,6 +15,9 @@ services:
     volumes:
       - static_volume:/app/static
       - media_volume:/app/media
+    networks:
+      - frontend
+      - backend
 
 
   db:
@@ -26,6 +29,12 @@ services:
     volumes:
       - postgres_data:/var/lib/postgresql
     restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DBNAME}"]
+      interval: 5s
+      retries: 5
+    networks:
+      - backend
 
   adminer:
     image: adminer
@@ -33,7 +42,9 @@ services:
       - db
     restart: always
     ports:
-      - 8080:8080
+      - 127.0.0.1:8080:8080
+    networks:
+      - backend
 
   proxy:
     image: nginx:stable
@@ -51,15 +62,12 @@ services:
       - NGINX_SSL_PORT=443
     depends_on:
       - web
+    networks:
+      - frontend
 
-  test:
-    build: .
-    command: python manage.py test
-    depends_on:
-      - db
-    profiles:
-      - test
-
+networks:
+  frontend:
+  backend:
 
 volumes:
   postgres_data: