add gh action to publish images

.github/workflows/build-and-publish.yml

@@ -0,0 +1,51 @@
+name: Build and Publish to Registry on Github push
+
+env:
+  GITHUB_SHA: ${{ github.sha }}
+  REGISTRY_HOSTNAME: docker.io
+
+on: 
+  - push
+  - workflow_dispatch
+
+jobs:
+  setup-build-publish-deploy:
+    name: Setup, Build, and Publish
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Prepare
+        id: prep
+        run: |
+          TAG=$(echo $GITHUB_SHA | head -c7)
+          IMAGE="hydroshare/hs-irods"
+          echo ::set-output name=tagged_image::${IMAGE}:${TAG}
+          echo ::set-output name=tag::${TAG}
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Docker Hub Login
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USER }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-single-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-single-buildx
+
+      - name: Build
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.prep.outputs.tagged_image }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max