Github workflow for nightly builds

.github/workflows/nightly-image-build.yaml

@@ -0,0 +1,50 @@
+name: Nightly Image Build
+
+on:
+    workflow_dispatch:
+    push:
+      branches:
+        - main
+
+env:
+    PYTHON_VERSION: 3.8
+    POETRY_VERSION: 1.5.1
+    QUAY_ORGANIZATION: 'project-codeflare'
+    SDK_FILE: 'codeflare_sdk-0.0.0.dev0.tar.gz'
+    IMAGE_TAG: 'dev'
+
+jobs:
+    nightly-build:
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout the repository
+              uses: actions/checkout@v3
+            - name: Install Python
+              uses: actions/setup-python@v4
+              with:
+                python-version: ${{ env.PYTHON_VERSION }}
+            - name: Install Poetry
+              uses: abatilo/actions-poetry@v2
+              with:
+                poetry-version: ${{ env.POETRY_VERSION }}
+            - name: Run poetry install
+              run: poetry install --with docs
+            - name: Run poetry build
+              run: poetry build
+            - name: Copy SDK package
+              run: cp dist/${SDK_FILE} custom-nb-image
+            - name: Modify Dockerfile to use locally built SDK
+              run: |
+                sed -i "s/ARG SDK_VERSION=.*/COPY ${{ env.SDK_FILE }} ./" custom-nb-image/Dockerfile
+                sed -i "s/codeflare-sdk==.*/${{ env.SDK_FILE }}\\\\/" custom-nb-image/Dockerfile
+            - name: Image Build
+              working-directory: custom-nb-image
+              run: docker build -t quay.io/${{ env.QUAY_ORGANIZATION }}/notebook:${{ env.IMAGE_TAG }} .
+            - name: Login to Quay.io
+              uses: docker/login-action@v2
+              with:
+                registry: quay.io
+                username: ${{ secrets.QUAY_ID }}
+                password: ${{ secrets.QUAY_TOKEN }}
+            - name: Image Push
+              run: docker push quay.io/${{ env.QUAY_ORGANIZATION }}/notebook:${{ env.IMAGE_TAG }}