Use postgres if available

docker-compose.yml

@@ -6,7 +6,9 @@ services:
     ports:
       - 8080:8888
     environment:
-      DOCKER: True
+      POSTGRES_PASSWORD: development
+      POSTGRES_USER: pflaenzli
+      POSTGRES_DB: pflaenzli
 
   db:
     image: postgres:15

pflaenzli/pflaenzli_django/settings.py

@@ -85,13 +85,13 @@ WSGI_APPLICATION = "pflaenzli_django.wsgi.application"
 
 # Database
 # https://docs.djangoproject.com/en/4.1/ref/settings/#databases
-if os.getenv("DOCKER"):
+if os.getenv('POSTGRES_DB') is not None:
     DATABASES = {
         'default': {
             'ENGINE': 'django.db.backends.postgresql',
-            'NAME': 'pflaenzli',
+            'NAME': os.getenv('POSTGRES_DB'),
-            'USER': 'pflaenzli',
+            'USER': os.getenv('POSTGRES_USER'),
-            'PASSWORD': 'development',
+            'PASSWORD': os.getenv('POSTGRES_PASSWORD'),
             'HOST': 'db',
             'PORT': '5432',
         }