validated jar and added docker publish back

Author: mfmaher2

.github/workflows/docker-publish.yml

@@ -0,0 +1,42 @@
+name: Build and publish to docker repo
+
+on:
+  workflow_dispatch:
+
+  jobs:
+    build_and_publish:
+      name: Build and publish docker image
+      runs-on: ubuntu-latest
+      steps:
+        - name: Check out source code
+          uses: actions/checkout@v3
+        # Setup metadata based on the commit/tag that will be used for tagging the image
+        - name: Setup Docker meta
+          id: meta
+          uses: docker/metadata-action@v3
+          with:
+            images: |
+              datastax/cassandra-data-migrator
+            flavor: |
+              latest=auto
+            tags: |
+              type=ref,event=branch
+              type=semver,pattern={{version}}
+              type=semver,pattern={{major}}.{{minor}}.x
+              type=semver,pattern={{major}}.x
+        - name: Set up Docker Buildx
+          uses: docker/setup-buildx-action@v2
+        - name: Login to DockerHub
+          uses: docker/login-action@v2
+          with:
+            username: ${{ secrets.DOCKER_HUB_USERNAME }}
+            password: ${{ secrets.DOCKER_HUB_PASSWORD }}
+        - name: Build and push
+          id: docker_build
+          uses: docker/build-push-action@v3
+          with:
+            file: Dockerfile
+            context: .
+            push: true
+            tags: ${{ steps.meta.outputs.tags }}
+            platforms: linux/amd64