Add release workflow actions

Author: ganesanarun

.github/workflows/release.yml

@@ -0,0 +1,23 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - name: Set env
+        run: echo ::set-env name=RELEASE_VERSION::${GITHUB_REF:10}
+      - name: Build with Maven
+        env:
+          DOCKER_REGISTRY_URL: docker.io
+          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+        run: mvn compile jib:build -Djib.to.auth.username=projecteka -Djib.to.auth.password=${DOCKER_PASSWORD} -Dimage=projecteka/gateway-db-initializer:${RELEASE_VERSION}

.gitignore

@@ -1,4 +1,4 @@
-.DS_Store

+.DS_Store
 .idea/
-
*.iml

+*.iml
 target