ci: add test for docker mount cache

Signed-off-by: Emilien Escalle <emilien.escalle@escemi.com>

Author: neilime

actions/docker/build-image/action.yml

@@ -124,8 +124,6 @@ outputs:
 runs:
   using: "composite"
   steps:
-    # #region Prepare build variables
-
     - shell: bash
       # FIXME: workaround until will be merged: https://github.com/actions/runner/pull/1684
       run: mkdir -p ./self-actions/ && cp -r $GITHUB_ACTION_PATH/../../* ./self-actions/
@@ -243,6 +241,7 @@ runs:
         platforms: ${{ inputs.platform }}
 
     - uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+      id: setup-buildx
       with:
         # FIXME: upgrade version when available (https://github.com/docker/buildx/releases)
         version: v0.29.1

tests/application/Dockerfile

@@ -2,10 +2,21 @@ FROM scratch AS base
 
 USER test
 
-FROM nginx:1-alpine AS prod
+FROM nginx:1 AS prod
 
 HEALTHCHECK --interval=5s --timeout=3s --retries=3 CMD ["curl", "-f", "http://localhost:8080/health/check"]
 
+# Install curl for healthcheck
+ENV DEBIAN_FRONTEND=noninteractive
+# hadolint ignore=DL3008
+RUN \
+  --mount=type=cache,target=/var/cache/apt,sharing=locked \
+  --mount=type=cache,target=/var/lib/apt,sharing=locked \
+  rm -f /etc/apt/apt.conf.d/docker-clean && \
+  echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' >/etc/apt/apt.conf.d/keep-cache && \
+  apt-get update && \
+  apt-get install -y curl
+
 # Configure nginx to listen on port 8080
 RUN sed -i 's/listen       80;/listen       8080;/' /etc/nginx/conf.d/default.conf