init docker image build and push

.github/workflows/docker-publish.yaml

@@ -0,0 +1,36 @@
+name: Build and Push Docker Image
+
+on: 
+  push: 
+    branches: 
+        - master
+
+jobs:
+  build-and-push-image:
+      runs-on: ubuntu-latest
+
+      steps:
+      # Checkout the repository
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Log in to Docker Hub
+        run: |
+          docker login -u ${{ secrets.DOCKER_HUB_USERNAME }} -p ${{ secrets.DOCKER_HUB_TOKEN }}
+      
+      # Docker build
+      - name: Docker build
+        run: |
+          IMAGE_NAME=oskarowskii/minesweeper-golang-htmx
+          COMMIT_SHA=${{ github.sha }}
+
+          docker build -t $IMAGE_NAME:latest -t $IMAGE_NAME:$COMMIT_SHA .
+
+      # Push to Docker Hub
+      - name: Push to Docker Hub
+        run: |
+          IMAGE_NAME=oskarowskii/minesweeper-golang-htmx
+          COMMIT_SHA=${{ github.sha }}
+
+          docker push $IMAGE_NAME:latest
+          docker push $IMAGE_NAME:$COMMIT_SHA