gh: Debug why docker pulled images is not used

Author: garazdawi

.github/.dockerignore

@@ -0,0 +1,4 @@
+workflows
+dockerfiles
+actions
+ISSUE_TEMPLATE

.github/scripts/build-base-image.sh

@@ -54,14 +54,19 @@ else
 
     BASE_IMAGE_ID=$(docker images -q "${BASE_TAG}:latest")
 
-    docker build --pull --tag "${BASE_TAG}:latest" \
+
+    set -x
+
+    DOCKER_BUILDKIT=1 docker build --pull --tag "${BASE_TAG}:latest" \
        ${BASE_CACHE} \
        --file ".github/dockerfiles/Dockerfile.${BASE_TYPE}" \
        --build-arg MAKEFLAGS=-j$(($(nproc) + 2)) \
        --build-arg USER=otptest --build-arg GROUP=uucp \
        --build-arg uid="$(id -u)" \
        --build-arg BASE="${BASE}" .github/
 
+    set +x
+
     NEW_BASE_IMAGE_ID=$(docker images -q "${BASE_TAG}:latest")
     if [ "${BASE_IMAGE_ID}" = "${NEW_BASE_IMAGE_ID}" ]; then
         echo "BASE_BUILD=cached" >> $GITHUB_OUTPUT