Add dockerhub build and push github action

.github/workflows/docker-image-build.yaml

@@ -0,0 +1,35 @@
+name: build and push image to dockerhub
+on:
+  workflow_dispatch:
+    inputs:
+      versionTag:
+        description: "Version Tag"
+        required: true
+        default: ""
+jobs:
+  main:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout to version
+        uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.inputs.versionTag }}
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+
+      - name: Build and push
+        id: docker-build
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          file: Dockerfile
+          platforms: linux/amd64
+          tags: |
+            onaio/dirt-tile-server:${{ github.event.inputs.versionTag }}
+
+      - name: Image digest
+        run: echo ${{ steps.docker-build.outputs.digest }}