feat: Introduce Stage to Build and Push Docker Image

.github/workflows/docker-build-push.yml

@@ -0,0 +1,44 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  docker-build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+        fetch-depth: 0
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME  }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Set build version
+        run: |
+          VERSION_PATTERN='([[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+)(-?rc[[:digit:]]+)?-?([[:digit:]]*)-?[[:alnum:]]*'
+          echo VERSION=$(git describe --tags > /dev/null 2>&1 && git describe --tags | head -1 | sed -re "s/${VERSION_PATTERN}/\\1.\\3\\2/" | sed -re 's/\.$/.0/') >> $GITHUB_ENV
+
+      - name: Build and push main image
+        uses: docker/build-push-action@v4
+        with:
+          push: true
+          tags: fossology/licensedb:latest
+          context: .
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          labels: |
+            org.opencontainers.image.version=${{ env.VERSION }}
+
+      - name: Log out from Docker Hub
+        run: docker logout