First cut at a GHA to automatically deploy. This is the first start for

#14.

.github/workflows/docker_build_push.yml

@@ -0,0 +1,50 @@
+name: Build and push blthayer/disquip-bot
+
+on:
+  push:
+
+jobs:
+
+  build-and-push:
+    name: Build and push
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout this repo
+        uses: actions/checkout@v2
+        with:
+          ref: ${{ github.ref }}
+
+      - name: Repo metadata
+        id: repo
+        uses: actions/github-script@v3
+        with:
+          script: |
+            const repo = await github.repos.get(context.repo)
+            return repo.data
+
+      - name: Docker meta
+        id: docker_meta
+        uses: crazy-max/ghaction-docker-meta@v1
+        with:
+          images: blthayer/disquip-bot
+          tag-sha: true
+
+      - name: Set up 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_PASSWORD }}
+
+      # Build and push!
+      - name: Build builder stage of gldpy
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ steps.docker_meta.outputs.tags }}
+          labels: ${{ steps.docker_meta.outputs.labels }}