refactor: GitHub Action to build and push to Docker Hub on tag

.github/workflows/on-push.yml

@@ -1,58 +0,0 @@
-name: Docker build on push
-
-env:
-    DOCKER_CLI_EXPERIMENTAL: enabled
-
-on:
-  push:
-    branches:
-      - master
-
-jobs:
-    build:
-        runs-on: ubuntu-20.04
-        name: Build and push lnbits image
-        steps:
-            - name: Login to Docker Hub
-              run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
-
-            - name: Checkout project
-              uses: actions/checkout@v2
-
-            - name: Set up QEMU
-              uses: docker/setup-qemu-action@v1
-              id: qemu
-
-            - name: Setup Docker buildx action
-              uses: docker/setup-buildx-action@v1
-              id: buildx
-
-            - name: Show available Docker buildx platforms
-              run: echo ${{ steps.buildx.outputs.platforms }}
-
-            - name: Cache Docker layers
-              uses: actions/cache@v2
-              id: cache
-              with:
-                path: /tmp/.buildx-cache
-                key: ${{ runner.os }}-buildx-${{ github.sha }}
-                restore-keys: |
-                  ${{ runner.os }}-buildx-
-
-            - name: Run Docker buildx against commit hash
-              run: |
-                  docker buildx build \
-                  --cache-from "type=local,src=/tmp/.buildx-cache" \
-                  --cache-to "type=local,dest=/tmp/.buildx-cache" \
-                  --platform linux/amd64,linux/arm64,linux/arm/v7 \
-                  --tag ${{ secrets.DOCKER_USERNAME }}/lnbits:${GITHUB_SHA:0:7} \
-                  --output "type=registry" ./
-
-            - name: Run Docker buildx against latest
-              run: |
-                  docker buildx build \
-                  --cache-from "type=local,src=/tmp/.buildx-cache" \
-                  --cache-to "type=local,dest=/tmp/.buildx-cache" \
-                  --platform linux/amd64,linux/arm64,linux/arm/v7 \
-                  --tag ${{ secrets.DOCKER_USERNAME }}/lnbits:latest \
-                  --output "type=registry" ./

.github/workflows/on-tag.yml

@@ -0,0 +1,68 @@
+name: Build and push Docker image on tag
+
+env:
+  DOCKER_CLI_EXPERIMENTAL: enabled
+
+on:
+  push:
+    tags:
+      - "[0-9]+.[0-9]+.[0-9]+"
+      - "[0-9]+.[0-9]+.[0-9]+-*"
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    name: Build and push lnbits image
+    steps:
+      - name: Login to Docker Hub
+        run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
+
+      - name: Checkout project
+        uses: actions/checkout@v2
+
+      - name: Import environment variables
+        id: import-env
+        shell: bash
+        run: echo "TAG=${GITHUB_REF/refs\/tags\//}" >> $GITHUB_ENV
+
+      - name: Show set environment variables
+        run: |
+          printf "    TAG: %s\n"  "$TAG"
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+        id: qemu
+
+      - name: Setup Docker buildx action
+        uses: docker/setup-buildx-action@v1
+        id: buildx
+
+      - name: Show available Docker buildx platforms
+        run: echo ${{ steps.buildx.outputs.platforms }}
+
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        id: cache
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+
+      - name: Run Docker buildx against tag
+        run: |
+            docker buildx build \
+            --cache-from "type=local,src=/tmp/.buildx-cache" \
+            --cache-to "type=local,dest=/tmp/.buildx-cache" \
+            --platform linux/amd64,linux/arm64 \
+            --tag ${{ secrets.DOCKER_USERNAME }}/lnbits-legend:${TAG} \
+            --output "type=registry" ./
+
+      - name: Run Docker buildx against latest
+        run: |
+            docker buildx build \
+            --cache-from "type=local,src=/tmp/.buildx-cache" \
+            --cache-to "type=local,dest=/tmp/.buildx-cache" \
+            --platform linux/amd64,linux/arm64 \
+            --tag ${{ secrets.DOCKER_USERNAME }}/lnbits-legend:latest \
+            --output "type=registry" ./