feat: push docker image from ci

limitations: currently only tags as latest

Author: EricCrosson

.github/workflows/release.yml

@@ -6,6 +6,26 @@ on:
     branches: [ master, alpha, beta ]
 
 jobs:
+  docker-push:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Configure Docker Buildx
+      uses: docker/setup-buildx-action@v1
+
+    - name: Login to DockerHub
+      uses: docker/login-action@v1
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_TOKEN }}
+
+    - name: Build and push
+      id: docker_build
+      uses: docker/build-push-action@v2
+      with:
+        push: true
+        # TODO(3): tag docker image with release version number
+        tags: hamroctopus/typescript-tools:latest
+
   build-linux-gnu:
     runs-on: ubuntu-latest
     steps: