chore(ci): add gitea actions runner compose setup

README.md

@@ -119,12 +119,20 @@ Environment examples:
 
 - `.env.staging.example`
 - `.env.production.example`
+- `.env.gitea-runner.example`
 
 Notes:
 
 - `dev` remains your local non-docker Bun workflow.
 - Staging and production compose files are templates and still require real secrets, registry strategy, and deployment host wiring.
 
+Gitea Actions runner compose (self-hosted):
+
+```bash
+cp .env.gitea-runner.example .env.gitea-runner
+docker compose --env-file .env.gitea-runner -f docker-compose.gitea-runner.yml up -d
+```
+
 ## Changelog
 
 - Changelog file: `CHANGELOG.md`