Adding manual build

Author: jackdmarquez

.github/workflows/manual_build.yml

@@ -0,0 +1,37 @@
+name: Manual Docker build and push
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to Docker Hub
+        run: echo ${{ secrets.DOCKERHUB_ACCESS_TOKEN }} | docker login -u ${{ secrets.DOCKERHUB_USERNAME }} --password-stdin
+
+      - name: Build and push register app session II
+        uses: docker/build-push-action@v3
+        with:
+          context: hands-on/session II/
+          push: true
+          file: ./hands-on/session II/Materials/Dockerfile
+          tags: ${{ secrets.DOCKERHUB_ORG }}/nsdf_tutorial:sessionII
+
+      - name: Build and push register app session III
+        uses: docker/build-push-action@v3
+        with:
+          context: hands-on/session III
+          push: true
+          file: ./hands-on/session III/Dockerfile
+          tags: ${{ secrets.DOCKERHUB_ORG }}/nsdf_tutorial:sessionIII
+
+    env:
+      DOCKER_CLI_EXPERIMENTAL: enabled
+      DOCKER_BUILDKIT: 1