Merge branch 'gh-workflow-update' into 'main'

feat: update github workflow

See merge request flarenetwork/flare-system-c-chain-indexer!50

Author: LukaAvbreht

.github/workflows/build-docker.yml

@@ -18,10 +18,32 @@ jobs:
     - uses: docker/setup-qemu-action@v3
     - uses: docker/setup-buildx-action@v3
 
-    - run: echo "IMAGE_TAG=latest" >> $GITHUB_ENV
-      if: github.ref_name == 'main'
-    - run: echo "IMAGE_TAG=${GITHUB_REF##*/}" >> $GITHUB_ENV
-      if: startsWith(github.ref, 'refs/tags/v')
+    - name: Set ALL_TAGS
+      env:
+        REPOSITORY: '${{ github.repository }}'
+      run: |
+        # tag main if main branch
+        if [[ "${{ github.ref_name }}" == "main" ]]; then
+          image_tags=("main")
+        # tag with tag name if tag
+        elif [[ "${{ github.ref }}" == refs/tags/v* ]]; then
+          image_tags=("${{ github.ref_name }}")
+          # tag with latest if tag is a new major, minor or patch version
+          if [[ "${{ github.ref_name}}" =~ ^v(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)$ ]]; then
+            image_tags+=("latest")
+          fi
+        fi
+
+        lc_repo=${REPOSITORY,,}
+
+        image_paths=()
+        for tag in ${image_tags[@]}; do
+          image_paths+=("ghcr.io/$lc_repo:$tag")
+        done
+
+        # join with ',' and then skip first character
+        ALL_TAGS=$(printf ',%s' "${image_paths[@]}")
+        echo "ALL_TAGS=${ALL_TAGS:1}" >>$GITHUB_ENV
 
     - name: Login to ghcr.io
       uses: docker/login-action@v3
@@ -36,5 +58,4 @@ jobs:
         context: . # Because GH actions are for kids and put protection on everything; https://stackoverflow.com/a/71159809/11276254
         platforms: linux/amd64,linux/arm64
         push: true
-        tags: |
-          ghcr.io/${{ github.repository }}:${{ env.IMAGE_TAG }}
+        tags: ${{ env.ALL_TAGS }}