feat(devbox): Build image

# Issue

To switch over our CI workflows to devbox a docker image is required.

# Fix

Build it from the Dockerfile generated with `devbox generate dockerfile`

Author: silvestre

.github/workflows/image.yaml

@@ -18,6 +18,40 @@ env:
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
+  build-and-push-devbox-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    name: Build and Push app-autoscaler-release-devbox
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}-devbox
+
+      - name: Build and push
+        id: build-and-push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ci/dockerfiles/autoscaler-devbox/Dockerfile
+          push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}-devbox:main
+
   build-and-push-image:
     runs-on: ubuntu-latest
     permissions:

ci/dockerfiles/autoscaler-devbox/Dockerfile

@@ -0,0 +1,18 @@
+FROM jetpackio/devbox@sha256:430afb5a5c9b4ec9f56776e8fcb82fe67fa5fabba3ba67ebb1c13b17d0e8de8d
+
+
+# Installing your devbox project
+WORKDIR /code
+USER root:root
+RUN mkdir -p /code && chown "${DEVBOX_USER}:${DEVBOX_USER}" /code
+USER ${DEVBOX_USER}:${DEVBOX_USER}
+COPY --chown=${DEVBOX_USER}:${DEVBOX_USER} devbox.json devbox.json
+COPY --chown=${DEVBOX_USER}:${DEVBOX_USER} devbox.lock devbox.lock
+
+
+# Step 6: Copying local flakes directories
+COPY local-flake local-flake
+
+RUN devbox run -- echo "Installed Packages."
+
+CMD ["devbox", "shell"]