fix: Gitea Traefik routing and connection pool optimization

- Remove middleware reference from Gitea Traefik labels (caused routing issues)
- Optimize Gitea connection pool settings (MAX_IDLE_CONNS=30, authentication_timeout=180s)
- Add explicit service reference in Traefik labels
- Fix intermittent 504 timeouts by improving PostgreSQL connection handling

Fixes Gitea unreachability via git.michaelschiemer.de

deployment/ansible/show-nginx-volumes.sh

@@ -10,11 +10,11 @@ echo ""
 
 # Solution 1: Use sed to extract the full nginx block, then grep for volumes
 timeout 90 ansible production -i inventory/production.yml -m shell -a \
-  "cd ~/deployment/stacks/application && docker compose config 2>&1 | sed -n '/^  nginx:/,/^  [a-z]/p' | grep -A 10 'volumes:'" \
+  "cd ~/deployment/stacks/production && docker compose config 2>&1 | sed -n '/^  nginx:/,/^  [a-z]/p' | grep -A 10 'volumes:'" \
   2>&1 || {
     echo ""
     echo "⚠️  Alternative method: Using larger grep context..."
     timeout 90 ansible production -i inventory/production.yml -m shell -a \
-      "cd ~/deployment/stacks/application && docker compose config 2>&1 | grep -A 50 'nginx:' | grep -A 10 'volumes:'" \
+      "cd ~/deployment/stacks/production && docker compose config 2>&1 | grep -A 50 'nginx:' | grep -A 10 'volumes:'" \
       2>&1
 }