docker

README.md

@@ -28,6 +28,20 @@ Open `index.html` directly in your browser, or use the optional local server scr
 ./scripts/smoke.ps1
 ```
 
+## Docker build & push (Gitea Actions)
+This repo includes a Gitea Actions workflow in `.gitea/workflows/docker.yml`.
+
+### Required secrets
+Set these in your Gitea repo secrets:
+- `REGISTRY_HOST` (e.g. `dock.ptslondon.co.uk`)
+- `REGISTRY_USERNAME`
+- `REGISTRY_PASSWORD`
+- `IMAGE_NAME` (e.g. `team/tiles`)
+
+The workflow builds and pushes:
+- `${REGISTRY_HOST}/${IMAGE_NAME}:latest`
+- `${REGISTRY_HOST}/${IMAGE_NAME}:${GITHUB_SHA}`
+
 ## Pattern JSON format
 ```json
 {