create release on tag

.github/workflows/build.yml

@@ -10,7 +10,8 @@ jobs:
         java: [ "8", "11", "17" ]
 
     steps:
-      - uses: actions/checkout@v3
+      - name: Checkout
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
 
@@ -32,16 +33,29 @@ jobs:
       - name: Build with Maven
         run: mvn --batch-mode --update-snapshots verify
 
-      - uses: actions/upload-artifact@v3
+      - name: Upload JAR
+        uses: actions/upload-artifact@v3
         if: ${{ matrix.java == '8' }}
         with:
           name: commafeed.jar
           path: commafeed-server/target/commafeed.jar
 
-      # Docker
+      - name: Create release
+        uses: softprops/action-gh-release@v1
+        if: ${{ matrix.java == '8' && github.ref_type == 'tag' }}
+        with:
+          name: CommaFeed ${{ github.ref_name }}
+          body: See changelog at https://github.com/Athou/commafeed/blob/master/CHANGELOG.md
+          draft: false
+          prerelease: false
+          files: |
+            commafeed-server/target/commafeed.jar
+            commafeed-server/config.yml.example
+
+          # Docker
       - name: Login to Container Registry
-        if: ${{ matrix.java == '8' }}
         uses: docker/login-action@v2
+        if: ${{ matrix.java == '8' }}
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}