From 79c3913e28216040612a3be56d4d439f9f936217 Mon Sep 17 00:00:00 2001
From: ted-cdw <ted.spinks@cdw.com>
Date: Tue, 21 Feb 2023 20:30:43 -0500
Subject: [PATCH] Add Dockerfile

---
 .github/workflows/flaskr-ci.yaml | 19 +++++++++----------
 examples/tutorial/Dockerfile     | 11 +++++++++++
 2 files changed, 20 insertions(+), 10 deletions(-)
 create mode 100644 examples/tutorial/Dockerfile

diff --git a/.github/workflows/flaskr-ci.yaml b/.github/workflows/flaskr-ci.yaml
index 611c8a0c..30225258 100644
--- a/.github/workflows/flaskr-ci.yaml
+++ b/.github/workflows/flaskr-ci.yaml
@@ -42,7 +42,8 @@ jobs:
       - name: Job vars and prep
         id: vars
         # Use bash string manipulation to create vars
-        # Note runner.temp isn't available in job.env, so use it here
+        # Note runner context isn't available in job.env, so use it here
+        # https://docs.github.com/en/actions/reference/context-and-expression-syntax-for-github-actions#context-availability
         run: |
           echo "SHA_SHORT=${GITHUB_SHA:0:10}" >> ${GITHUB_ENV}
           echo "REPO_LOWER_CASE=${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}
@@ -70,16 +71,14 @@ jobs:
         with:
           context: examples/tutorial
           push: true
-          # tags: "ghcr.io/${{ github.repository }}:${{ steps.vars.outputs.sha_short }}"
           tags: "ghcr.io/${{ env.REPO_LOWER_CASE }}:${{ env.SHA_SHORT }}"
           cache-from: type=local,src=${{ env.CACHE }}
           cache-to: type=local,dest=${{ env.NEW_CACHE }}
-        # This ugly bit is necessary if you don't want your cache to grow forever
-        # until it hits GitHub's limit of 5GB.
-        # Temp fix
-        # https://github.com/docker/build-push-action/issues/252
-        # https://github.com/moby/buildkit/issues/1896
-      - name: Move cache
+      # Only save the latest Docker build layers to the cache, otherwise
+      # the cache will keep growing indefinitely, past the 10GB max
+      # https://github.com/docker/build-push-action/issues/252
+      # https://github.com/moby/buildkit/issues/1896
+      - name: Only persist the new cache layers
         run: |
-          rm -rf $CACHE
-          mv $NEW_CACHE $CACHE
+          rm -rf ${CACHE)
+          mv ${NEW_CACHE} ${CACHE}
diff --git a/examples/tutorial/Dockerfile b/examples/tutorial/Dockerfile
new file mode 100644
index 00000000..cdeef98d
--- /dev/null
+++ b/examples/tutorial/Dockerfile
@@ -0,0 +1,11 @@
+FROM python:3.11.2-alpine3.17
+
+COPY . "/tutorial"
+WORKDIR /tutorial
+
+RUN pip install .
+RUN flask --app=flaskr init-db
+
+EXPOSE 5000
+
+CMD [ "flask", "--app=flaskr", "run", "--host=0.0.0.0"]
\ No newline at end of file