feat(templates): Add gitea-runner docker-compose file

templates/gitea-runner/README.md

@@ -1,8 +1,25 @@
-# gitea-runner (templates)
+# Gitea Actions Runner (Portainer template)
 
-### Description
-Description for gitea-runner goes here.
+Gitea Actions Runner (act_runner) is a runner for Gitea Actions. It is compatible with GitHub Actions and allows you to run CI/CD workflows within your Gitea instance.
 
-### Configuration
-- Path: templates/gitea-runner/docker-compose.yml
-- Status: Draft
+Quick notes:
+
+- **Registration**: You will need a registration token from your Gitea instance (Site Administration > Actions > Runners).
+- **Docker-in-Docker**: To run container-based actions, the runner requires access to the Docker socket (`/var/run/docker.sock`).
+- **Persistence**: Ensure the data volume is mapped to persist the runner configuration and registration state.
+
+Usage:
+
+1. Import the compose file into Portainer's Stacks or App Templates.
+2. Configure the `GITEA_INSTANCE_URL` and `GITEA_RUNNER_REGISTRATION_TOKEN` environment variables.
+3. Ensure the volume mapping for `/var/run/docker.sock` is correctly set if you plan to use Docker-based workflows.
+4. Deploy the stack via Portainer.
+5. Verify the runner appears as "Online" in your Gitea settings.
+
+Helpful links:
+
+- Gitea Actions Documentation: https://docs.gitea.com/usage/actions/overview
+- Runner Repository: https://gitea.com/gitea/act_runner
+- Docker Hub: https://hub.docker.com/r/gitea/act_runner
+
+**Status:** Ready for configuration