Use --add-host to map localhost to Docker host in job containers

This allows containers to reach Forgejo at localhost:3001 for git operations.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ansible/roles/forgejo_runner/templates/config.yaml.j2

@@ -8,9 +8,11 @@ runner:
   timeout: {{ forgejo_runner_timeout }}
 
 container:
-  # Use host network so containers can reach localhost:3001 (Forgejo)
-  network: "host"
+  network: "bridge"
   privileged: {{ forgejo_runner_privileged | lower }}
+  # Map localhost to Docker host so containers can reach Forgejo at localhost:3001
+  # host-gateway is a special Docker value that resolves to the host IP
+  options: "--add-host localhost:host-gateway"
   # Mount Docker socket so jobs can build containers
   valid_volumes:
     - /var/run/docker.sock