CI/CD: Cache server Docker image to speed up time for setting up server

.github/actions/run-ee-server/action.yml

@@ -42,8 +42,8 @@ runs:
     shell: bash
 
   # macOS Github runners and Windows self-hosted runners don't have buildx installed by default
-  - if: ${{ runner.os == 'Windows' || runner.os == 'macOS' }}
-    uses: docker/setup-buildx-action@v3
+  # Also we want to use the docker-container driver so we can cache our custom server image
+  - uses: docker/setup-buildx-action@v3
 
   - run: echo CA_CERT_FILE_NAME="ca.cer" >> $GITHUB_ENV
     shell: bash
@@ -62,10 +62,12 @@ runs:
         SERVER_IMAGE=${{ env.IMAGE_NAME }}
         TLS_PORT=${{ env.TLS_PORT }}
       tags: ${{ env.NEW_IMAGE_NAME }}
-      # setup-buildx-action configures Docker to use the docker-container build driver
-      # This driver doesn't publish an image locally by default
+      # the docker-container driver doesn't publish an image locally by default
       # so we have to manually enable it
       load: true
+      # Also cache so we don't have to rebuild every time we use this action
+      cache-from: type=gha
+      cache-to: type=gha,mode=max
 
   - run: echo SERVER_CONTAINER_NAME="aerospike" >> $GITHUB_ENV
     shell: bash

.github/workflows/docker-build-context/Dockerfile

@@ -81,6 +81,8 @@ EXPOSE $TLS_PORT
 FROM ubuntu:24.04 AS dos2unix
 
 # Run our own set up steps after server finishes starting up
+# Running WORKDIR on an existing directory causes WORKDIR instruction to not be cached
+RUN mkdir /my-scripts
 WORKDIR /my-scripts
 COPY entrypoint-finalize-setup.bash wait-for-as-server-to-start.bash .
 # Both Github Actions and the entrypoint script can reuse this wait script