follow docker/build-push-action#406 (comment) for docker image cachin…

…g in gh actions

.github/workflows/main.yml

@@ -42,6 +42,9 @@ jobs:
     -
       name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v1
+        with:
+          version: v0.6.0
+          buildkitd-flags: --debug
     -
       name: Login to DockerHub
       uses: docker/login-action@v1
@@ -55,6 +58,8 @@ jobs:
       with:
         push: true
         tags: jrheard/rask_api:latest
+        cache-from: type=gha
+        cache-to: type=gha
     -
       name: Image digest
       run: echo ${{ steps.docker_build.outputs.digest }}

design-doc.md

@@ -44,6 +44,11 @@ Stretch Overengineering Exercises
 - [ ] Monitoring?
 - [ ] Alerting?
 
+Less Crazy Overengineering Exercises
+====================================
+Getting a full kubernetes setup running seems potentially expensive. What about https://devcenter.heroku.com/articles/container-registry-and-runtime ?
+I also need to look into Linode, it has a Kubernetes offering too.
+
 High-Level Design
 =================
 * Users primarily interact with the system via a CLI similar to `task`