[CI] set up postgres service in workflow

also makes it use a .env.ci file that uses the correct host name

.env.ci

@@ -0,0 +1,4 @@
+DATABASE_URL=psql://teilchensammler:teilchensammler@database:5432/teilchensammler_test
+DEBUG=On
+SECRET_KEY=django-insecure-x=%#_wxu0h=d*m#seui9+mjh3vu7of8+4+gpwj@556.un0r1%.
+DEPLOYMENT=Test

.woodpecker/workflow.yaml

@@ -13,9 +13,15 @@ steps:
     environment:
       DJANGO_SETTINGS_MODULE: config.settings
       DEPLOYMENT: Test
-      ENV_PATH: .env.test
+      ENV_PATH: .env.ci
     commands:
       - python -m venv venv
       - /bin/bash -c "source venv/bin/activate"
       - python -m pip install --disable-pip-version-check -r requirements/test.txt
       - python -m pytest
+
+services:
+  - name: database
+    image: postgres:17
+    environment:
+      POSTGRES_PASSWORD: teilchensammler