fix: isolate prod deploy from dev env port conflict

The production deploy failed because port 3000 was already bound by the
dev frontend container (bilhej-frontend). The prod frontend doesn't need
a host port at all — nginx talks to it via the external 'web' network.

Changes:
- Remove host port binding (3000:80) from prod frontend
- Remove unused 'certs' volume from prod compose
- Use --project-name bilhej-prod in deploy workflow to isolate prod
  containers/networks from dev and e2e environments
- Add 'docker compose down' before 'up' for clean deploys
- Update health check network names to bilhej-prod_default

.forgejo/workflows/deploy.yml

@@ -42,7 +42,8 @@ jobs:
 
       - name: Build and start production stack
         run: |
-          docker compose -f docker-compose.prod.yml up --build -d
+          docker compose -p bilhej-prod -f docker-compose.prod.yml down
+          docker compose -p bilhej-prod -f docker-compose.prod.yml up --build -d
 
       - name: Wait for services
         run: sleep 20
@@ -50,7 +51,7 @@ jobs:
       - name: Health check — backend API
         run: |
           for i in 1 2 3 4 5; do
-            if docker run --rm --network bilhej_default curlimages/curl:8.5.0 \
+            if docker run --rm --network bilhej-prod_default curlimages/curl:8.5.0 \
                -sf http://bilhej-backend-prod:8080/api/vehicles/ZZZ999; then
               echo "Backend is healthy"
               exit 0
@@ -64,7 +65,7 @@ jobs:
       - name: Health check — frontend
         run: |
           for i in 1 2 3 4 5; do
-            if docker run --rm --network bilhej_default curlimages/curl:8.5.0 \
+            if docker run --rm --network bilhej-prod_default curlimages/curl:8.5.0 \
                -sf http://bilhej-frontend-prod/ | grep -qi "bilhej\|Bilhej\|BilHej"; then
               echo "Frontend is serving"
               exit 0
@@ -82,7 +83,7 @@ jobs:
           echo "  Deployed ${{ github.event.inputs.version }} to production"
           echo "═══════════════════════════════════════════════════"
           echo ""
-          docker compose -f docker-compose.prod.yml ps
+          docker compose -p bilhej-prod -f docker-compose.prod.yml ps
           echo ""
           echo "Containers running. Update nginx config on srvr.nu"
           echo "to point bilhej.se to the frontend container."

docker-compose.prod.yml

@@ -39,12 +39,8 @@ services:
       dockerfile: docker/frontend.prod.Dockerfile
       context: .
     container_name: bilhej-frontend-prod
-    ports:
-      - "3000:80"
     depends_on:
       - backend
-    volumes:
-      - certs:/etc/nginx/certs
     networks:
       - default
       - web
@@ -52,7 +48,6 @@ services:
 
 volumes:
   pgdata-prod:
-  certs:
 
 networks:
   web: