add: basic github action wf

.github/workflows/main.yaml

@@ -0,0 +1,21 @@
+name: Container Build for atlantis-hub
+
+on:
+  push:
+    branches:
+      - "master"
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    environment:
+        name: prod
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Build and run test container
+        run: |
+          docker build -t test .
+          docker run test
+      - name: Check exit code
+        run: exit $?