Merge pull request #4 from ba-st/codeloading

Add docker image for loading pharo code

.github/workflows/docker-build.yml

@@ -15,7 +15,7 @@ jobs:
     name: Build and Publish Docker images
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Docker meta
         id: docker_meta
         uses: crazy-max/ghaction-docker-meta@v1
@@ -38,4 +38,18 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.docker_meta.outputs.tags }}
           labels: ${{ steps.docker_meta.outputs.labels }}
-          secrets: GIT_AUTH_TOKEN=${{ secrets.DOCKER_REGISTRY_TOKEN }}
+          secrets: GIT_AUTH_TOKEN=${{ secrets.DOCKER_REGISTRY_TOKEN }}
+      - name: Docker meta loader
+        id: docker_meta_loader
+        uses: crazy-max/ghaction-docker-meta@v1
+        with:
+          images: ghcr.io/${{ github.repository_owner }}/pharo-loader
+      - name: Docker build and push loader
+        uses: docker/build-push-action@v2
+        with:
+          context: ./source
+          file: ./source/Dockerfile-loader
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.docker_meta_loader.outputs.tags }}
+          labels: ${{ steps.docker_meta_loader.outputs.labels }}
+          secrets: GIT_AUTH_TOKEN=${{ secrets.DOCKER_REGISTRY_TOKEN }}

docs/how-to-guides/how-to-use-as-dependency.md

@@ -5,3 +5,21 @@ In your `Dockerfile` put something like:
 ```dockerfile
 FROM ghcr.io/ba-st/pharo:v10.0.0
 ```
+
+If you want to create a custom Pharo image it's better to use multi-stage builds
+using `pharo-loader` as the base to load the code. This image disables Epicea and
+configure Iceberg to use HTTPS.
+
+For example
+
+```dockerfile
+FROM ghcr.io/ba-st/pharo-loader:v10.0.0 AS loader
+RUN pharo metacello install github://owner/repo:branch BaselineOfProject
+
+FROM ghcr.io/ba-st/pharo:v10.0.0
+COPY --from=loader /opt/pharo/Pharo.image ./
+COPY --from=loader /opt/pharo/Pharo.changes ./
+COPY --from=loader /opt/pharo/Pharo*.sources ./
+
+...
+```

source/Dockerfile-loader

@@ -0,0 +1,3 @@
+FROM ghcr.io/ba-st/pharo:v10.0.0
+RUN pharo eval --save "EpMonitor current disable"
+RUN pharo eval --save "Iceberg remoteTypeSelector: #httpsUrl"