Fix postgres service for Forgejo Docker runner

Remove host port binding (conflicts with local postgres on runner) and
use service name hostname instead of localhost for DATABASE_URL.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.forgejo/workflows/deploy.yml

@@ -30,8 +30,6 @@ jobs:
                     --health-interval 10s
                     --health-timeout 5s
                     --health-retries 5
-                ports:
-                    - 5432:5432
 
         steps:
             - name: ⬇️ Checkout repo
@@ -49,7 +47,7 @@ jobs:
             - name: 🧪 Run unit tests
               run: npm run test:run
               env:
-                  DATABASE_URL: postgresql://test:test@localhost:5432/brackt_test
+                  DATABASE_URL: postgresql://test:test@postgres:5432/brackt_test
                   NODE_OPTIONS: --max-old-space-size=4096
 
     typecheck: