Move docker files to folder and add CI step to publish docker images

.github/workflows/main.yml

@@ -14,15 +14,17 @@ on:
         description: 'Run the build with tmate debugging enabled'
         required: false
         default: false
-
+      build_docker_images:
+        description: 'An existing tag for which to build new docker images and publish them to dockerhub'
+        required: false
+        default: ''
 env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
   BUILD_TYPE: Debug
   LOCAL: local
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
-  # This workflow contains a single job called "build"
   build:
     # The type of runner that the job will run on
     runs-on: ubuntu-20.04
@@ -92,3 +94,38 @@ jobs:
         uses: coverallsapp/github-action@master
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
+  build-docker-images:
+    if: ${{ github.ref_type == 'tag' || github.event.inputs.build_docker_images }}
+    runs-on: ubuntu-20.04
+    strategy:
+      # user depends on dev depends on deps, so don't run in parallel
+      max-parallel: 1
+      matrix:
+        include:
+          - dockerfile: deps
+            tag: hermes-deps
+          - dockerfile: dev
+            tag: hermes-dev
+          - dockerfile: user
+            tag: hermes
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          # Checkout the appropriate tag if we're forcing a docker build
+          ref: ${{ github.event.input.build_docker_images }}
+      - 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 ${{matrix.dockerfile}}.Dockerfile
+        uses: docker/build-push-action@v2
+        with:
+          context: ./
+          file: ./docker/${{matrix.dockerfile}}.Dockerfile
+          builder: ${{ steps.buildx.outputs.name }}
+          push: true
+          tags: hdfgroup/${{matrix.tag}}:latest