add and configure database container

docker-compose.yml

@@ -1,8 +1,25 @@
 services:
 
+  db:
+    image: postgres:14-alpine
+    environment:
+      POSTGRES_DB: "gaehsnitzdb"
+      POSTGRES_USER: "gaehsnitzuser"
+      POSTGRES_PASSWORD: "SCKL97ukwICPpjJ9rXyhdljZ86T29A"
+    expose:
+      - "5432"
+
   web:
     build:
       context: .
+    environment:
+      DB_HOST: "db"
+      DB_PORT: "5432"
+      DB_NAME: "gaehsnitzdb"
+      DB_USER: "gaehsnitzuser"
+      DB_PASSWORD: "SCKL97ukwICPpjJ9rXyhdljZ86T29A"
+    depends_on:
+      - db
     ports:
       - "80:8000"
     volumes:

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 = [

requirements.txt

@@ -1,2 +1,3 @@
 django==4.0.6
 gunicorn==20.1.0
+psycopg2-binary==2.9.3