build(*): Improve build automation

.github/workflows/docker.yml

@@ -1,14 +1,9 @@
-name: Docker
+name: Docker CI
 
 on:
   pull_request:
     branches:
       - main
-  push:
-    branches:
-      - main
-    tags:
-      - "v*.*.*"
 
 env:
   IMAGE_NAME: jcreek23/open-network-diagram
@@ -26,30 +21,21 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Log in to Docker Hub
-        if: github.event_name == 'push'
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
       - name: Extract Docker metadata
         id: meta
         uses: docker/metadata-action@v5
         with:
           images: docker.io/${{ env.IMAGE_NAME }}
           tags: |
-            type=raw,value=latest,enable={{is_default_branch}}
+            type=ref,event=pr
             type=sha,prefix=sha-
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
 
-      - name: Build (PR) / Build+Push (push)
+      - name: Build (PR validation only)
         uses: docker/build-push-action@v6
         with:
           context: .
           file: Dockerfile
-          push: ${{ github.event_name == 'push' }}
+          push: false
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha

.github/workflows/release.yml

@@ -0,0 +1,88 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - main
+
+env:
+  IMAGE_NAME: jcreek23/open-network-diagram
+
+concurrency:
+  group: release-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    outputs:
+      new_release_published: ${{ steps.semantic.outputs.new_release_published }}
+      new_release_version: ${{ steps.semantic.outputs.new_release_version }}
+      new_release_major_version: ${{ steps.semantic.outputs.new_release_major_version }}
+      new_release_minor_version: ${{ steps.semantic.outputs.new_release_minor_version }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Create Git tag + GitHub release
+        id: semantic
+        uses: cycjimmy/semantic-release-action@v4
+        with:
+          extra_plugins: |
+            @semantic-release/commit-analyzer
+            @semantic-release/release-notes-generator
+            @semantic-release/github
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  docker:
+    needs: release
+    if: needs.release.outputs.new_release_published == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: docker.io/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest
+            type=raw,value=${{ needs.release.outputs.new_release_version }}
+            type=raw,value=${{ needs.release.outputs.new_release_major_version }}.${{ needs.release.outputs.new_release_minor_version }}
+            type=sha,prefix=sha-
+
+      - name: Build and push release image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max