Test pipeline (#279)

* get separate image name for staging

* fix env

.github/workflows/build.yml

@@ -9,7 +9,6 @@ on:
 
 env:
   REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ github.repository }}
 
 jobs:
   build:
@@ -19,6 +18,17 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v3
 
+      - name: Get full image name
+        id: base_image_name
+        env:
+          BASE_IMAGE_NAME: ${{ github.repository }}
+        run: |
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            echo "image_name=${REGISTRY}/${BASE_IMAGE_NAME}" >> $GITHUB_OUTPUT
+          else
+            echo "image_name=${REGISTRY}/${BASE_IMAGE_NAME}-stage" >> $GITHUB_OUTPUT
+          fi
+
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v2
         with:
@@ -30,7 +40,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v4
         with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          images: ${{ steps.base_image_name.outputs.image_name }}
           tags: |
             type=ref,event=branch
             type=ref,event=pr