push docker image of dolt to dockerhub (#4470)

.github/workflows/cd-push-docker-image.yaml

@@ -0,0 +1,34 @@
+name: Push Docker Image to DockerHub
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'SemVer format release tag, i.e. 0.24.5'
+        required: true
+  repository_dispatch:
+    types: [ push-docker-image ]
+
+jobs:
+  docker-image-push:
+    name: Push Docker Image
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./docker/Dockerfile
+          push: true
+          tags: ${{ secrets.DOCKER_HUB_USERNAME }}/dolt:${{ github.event.inputs.version || github.event.client_payload.version }} , ${{ secrets.DOCKER_HUB_USERNAME }}/dolt:latest
+          build-args: |
+            DOLT_VERSION=${{ github.event.inputs.version || github.event.client_payload.version }}

.github/workflows/cd-release.yaml

@@ -164,3 +164,14 @@ jobs:
           token: ${{ secrets.REPO_ACCESS_TOKEN }}
           event-type: release-dolt
           client-payload: '{"version": "${{ needs.format-version.outputs.version }}", "actor": "${{ github.actor }}"}'
+
+  docker-image-push:
+    needs: [ format-version, create-release ]
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Trigger Push Docker Image
+        uses: peter-evans/repository-dispatch@v1
+        with:
+          token: ${{ secrets.REPO_ACCESS_TOKEN }}
+          event-type: push-docker-image
+          client-payload: '{"version": "${{ needs.format-version.outputs.version }}"}'

docker/Dockerfile

@@ -0,0 +1,11 @@
+# syntax=docker/dockerfile:1.3-labs
+FROM --platform=linux/amd64 ubuntu:22.04
+
+ARG DOLT_VERSION
+
+ADD https://github.com/dolthub/dolt/releases/download/v${DOLT_VERSION}/dolt-linux-amd64.tar.gz dolt-linux-amd64.tar.gz
+RUN tar zxvf dolt-linux-amd64.tar.gz && \
+    cp dolt-linux-amd64/bin/dolt /usr/local/bin && \
+    rm -rf dolt-linux-amd64 dolt-linux-amd64.tar.gz
+
+CMD ["/usr/local/bin/dolt"]