Better support publishing container images from forked repos (#161)

Allow setting target container registry with a repo scoped variable

.github/workflows/docker-publish-on-comment.yml

@@ -10,6 +10,10 @@ on:
     types: [created]
 
 
+env:
+  DOCKERHUB_USERNAME: ${{ vars.DOCKERHUB_USERNAME }}
+  IMAGE_NAME: ${{ vars.IMAGE_NAME }}
+  REGISTRY: ${{ vars.REGISTRY }}
 
 jobs:
   build:
@@ -54,10 +58,10 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Log into Docker Hub registry 
-        if: secrets.DOCKERHUB_TOKEN != ''
+        if: env.DOCKERHUB_USERNAME != '' 
         uses: docker/login-action@3d58c274f17dffee475a5520cbe67f0a882c4dbb
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          username: ${{ env.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       # Extract metadata (tags, labels) for Docker

.github/workflows/docker-publish.yml

@@ -15,6 +15,10 @@ on:
   pull_request:
     branches: [ "main" ]
 
+env:
+  DOCKERHUB_USERNAME: ${{ vars.DOCKERHUB_USERNAME }}
+  IMAGE_NAME: ${{ vars.IMAGE_NAME }}
+  REGISTRY: ${{ vars.REGISTRY }}
 
 jobs:
   build:
@@ -56,10 +60,10 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Log into Docker Hub registry 
-        if: github.event_name != 'pull_request' && secrets.DOCKERHUB_TOKEN != ''
+        if: github.event_name != 'pull_request' && env.DOCKERHUB_USERNAME != ''
         uses: docker/login-action@3d58c274f17dffee475a5520cbe67f0a882c4dbb
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          username: ${{ env.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       # Extract metadata (tags, labels) for Docker

README.md

@@ -166,6 +166,14 @@ See [here](docs/observability.md)
 * Add a webhook to repo setting (don't forget the `/webhook` path in the URL).
 * Content type needs to be `application/json`, **currently** only PR events are needed
 
+To publish container images from a forked repo set the `IMAGE_NAME` and `REGISTRY` GitHub Action Repository variables to use GitHub packages.
+`REGISTRY` should be `ghcr.io` and `IMAGE_NAME` should match the repository slug, like so:
+like so:
+<img width="785" alt="image" src="https://github.com/commercetools/telefonistka/assets/1616153/2f7201d6-fdb2-4cbf-8705-d6da7f4f6e80">
+
+
+
+
 ## Roadmap
 
 See the [open issues](https://github.com/wayfair-incubator/telefonistka/issues) for a list of proposed features (and known issues).