add github actions for build and publish to docker hub

.github/workflows/publish-docker.yml

@@ -0,0 +1,36 @@
+name: Publish Docker Image on Tag
+
+on:
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+'
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Extract version tag
+        id: vars
+        run: |
+          TAG="${GITHUB_REF##*/}"  # Get tag from GITHUB_REF
+          echo "tag=${TAG}" >> $GITHUB_ENV
+
+      - name: Build Docker image
+        run: |
+          docker build -t 100nandoo/gobot:${{ env.tag }} .
+          docker tag 100nandoo/gobot:${{ env.tag }} 100nandoo/gobot:latest
+
+      - name: Push Docker image with tag
+        run: |
+          docker push 100nandoo/gobot:${{ env.tag }}
+          docker push 100nandoo/gobot:latest