👷(frontend) push frontend image to DockerHub

Build and push the frontend image to DockerHub. Backend an Frontend
images will be stored in separate repos: people-backend and people-frontend.

It will be cleaner than managing all images in a single repo and creating
tags to discriminate frontend and backend images.

CI code is not factorized between jobs. Frontend and backend jobs could be
a bit factorized. Hovewer it might be a bit premature, and I prefer having
them decoupled for now. @rouja suggested to introduce a custom github actions
to avoid maintaining the same logic accross different repo.

Please not as the images are built from the same Dockerfile, it's important
to precise the right target.

.github/workflows/docker-hub.yml

@@ -12,7 +12,7 @@ on:
       - 'main'
 
 jobs:
-  build-and-push:
+  build-and-push-backend:
     runs-on: ubuntu-latest
     steps:
       -
@@ -23,7 +23,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: lasuite/people
+          images: lasuite/people-backend
       -
         name: Load sops secrets
         uses: rouja/actions-sops@main
@@ -39,6 +39,39 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           context: .
+          target: production
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+  build-and-push-frontend:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: lasuite/people-frontend
+      -
+        name: Load sops secrets
+        uses: rouja/actions-sops@main
+        with:
+          secret-file: .github/workflows/secrets.enc.env
+          age-key: ${{ secrets.SOPS_PRIVATE }}
+      -
+        name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        run: echo "$DOCKER_HUB_PASSWORD" | docker login -u "$DOCKER_HUB_USER" --password-stdin
+      -
+        name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          target: frontend
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}