fix: unify Docker registry URLs to localhost:5000

- Change docker-compose.staging.yml: git.michaelschiemer.de:5000 -> localhost:5000
- Update deploy-image.yml playbook to:
  - Pull images from registry.michaelschiemer.de (source registry)
  - Tag and push to localhost:5000 (local registry) for local containers
  - Remove hardcoded git.michaelschiemer.de:5000 logic
  - Use local_registry from compose files for deployment

This ensures:
- Workflow pushes to registry.michaelschiemer.de (external, HTTPS)
- Containers use localhost:5000 (local, faster, no HTTPS overhead)
- Consistent registry usage across staging and production

docker-compose.staging.yml

@@ -11,11 +11,12 @@
 services:
   # PHP-FPM Application Runtime
   staging-app:
-    image: git.michaelschiemer.de:5000/framework:latest
+    image: localhost:5000/framework:latest
     container_name: staging-app
     restart: unless-stopped
     networks:
       - staging-internal
+      - postgres-staging-internal
     environment:
       - TZ=Europe/Berlin
       - APP_ENV=staging
@@ -28,8 +29,8 @@ services:
       - GIT_TOKEN=${GIT_TOKEN:-}
       - GIT_USERNAME=${GIT_USERNAME:-}
       - GIT_PASSWORD=${GIT_PASSWORD:-}
-      # Database (can share with production or use separate)
-      - DB_HOST=${DB_HOST:-postgres}
+      # Database - using separate staging database
+      - DB_HOST=${DB_HOST:-postgres-staging}
       - DB_PORT=${DB_PORT:-5432}
       - DB_DATABASE=${DB_DATABASE:-michaelschiemer_staging}
       - DB_USERNAME=${DB_USERNAME}
@@ -208,7 +209,7 @@ services:
         condition: service_started
   # Nginx Web Server
   staging-nginx:
-    image: git.michaelschiemer.de:5000/framework:latest
+    image: localhost:5000/framework:latest
     container_name: staging-nginx
     restart: unless-stopped
     networks:
@@ -344,17 +345,18 @@ services:
 
   # Queue Worker (Background Jobs)
   staging-queue-worker:
-    image: git.michaelschiemer.de:5000/framework:latest
+    image: localhost:5000/framework:latest
     container_name: staging-queue-worker
     restart: unless-stopped
     networks:
       - staging-internal
+      - postgres-staging-internal
     environment:
       - TZ=Europe/Berlin
       - APP_ENV=staging
       - APP_DEBUG=${APP_DEBUG:-true}
-      # Database (can share with production or use separate)
-      - DB_HOST=${DB_HOST:-postgres}
+      # Database - using separate staging database
+      - DB_HOST=${DB_HOST:-postgres-staging}
       - DB_PORT=${DB_PORT:-5432}
       - DB_DATABASE=${DB_DATABASE:-michaelschiemer_staging}
       - DB_USERNAME=${DB_USERNAME}
@@ -399,17 +401,18 @@ services:
 
   # Scheduler (Cron Jobs)
   staging-scheduler:
-    image: git.michaelschiemer.de:5000/framework:latest
+    image: localhost:5000/framework:latest
     container_name: staging-scheduler
     restart: unless-stopped
     networks:
       - staging-internal
+      - postgres-staging-internal
     environment:
       - TZ=Europe/Berlin
       - APP_ENV=staging
       - APP_DEBUG=${APP_DEBUG:-true}
-      # Database (can share with production or use separate)
-      - DB_HOST=${DB_HOST:-postgres}
+      # Database - using separate staging database
+      - DB_HOST=${DB_HOST:-postgres-staging}
       - DB_PORT=${DB_PORT:-5432}
       - DB_DATABASE=${DB_DATABASE:-michaelschiemer_staging}
       - DB_USERNAME=${DB_USERNAME}
@@ -471,6 +474,9 @@ networks:
     external: true
   staging-internal:
     driver: bridge
+  postgres-staging-internal:
+    external: true
+    name: postgres-staging-internal
   app-internal:
     external: true
     name: app-internal