add and configure database container

gaehsnitzproject/settings.py

@@ -51,6 +51,19 @@ MIDDLEWARE = [
     "django.middleware.clickjacking.XFrameOptionsMiddleware",
 ]
 
+DATABASES = {
+    "default": {
+        "ENGINE": "django.db.backends.postgresql",
+        "HOST": os.environ["DB_HOST"],
+        "PORT": os.environ["DB_PORT"],
+        "NAME": os.environ["DB_NAME"],
+        "USER": os.environ["DB_USER"],
+        "PASSWORD": os.environ["DB_PASSWORD"],
+    }
+}
+
+DEFAULT_AUTO_FIELD = "django.db.models.SmallAutoField"
+
 ROOT_URLCONF = "gaehsnitzproject.urls"
 
 TEMPLATES = [