doc: add images.json to build image

Refs: paketo-community#88

The plan is to use it in the extensions to find the run
images instead of data in the extension.toml file

Signed-off-by: Michael Dawson <mdawson@devrus.com>

.gitignore

@@ -7,3 +7,4 @@ build-java-8/
 build-java-11/
 build-java-17/
 build-java-21/
+stack/images.json

scripts/create.sh

@@ -64,6 +64,9 @@ function main() {
 
   tools::install
 
+  # we need to copy images.json for inclusion in the build image
+  cp images.json stack
+
   # if stack or build argument is provided but not both, then throw an error
   if [[ -n "${stack_dir_name}" && ! -n "${build_dir_name}" ]] || [[ ! -n "${stack_dir_name}" && -n "${build_dir_name}" ]]; then
     util::print::error "Both stack-dir and build-dir must be provided"

stack/build.Dockerfile

@@ -1 +1,5 @@
 FROM registry.access.redhat.com/ubi8/ubi-minimal:latest
+USER root
+RUN mkdir -p /etc/buildpacks
+COPY ./images.json /etc/buildpacks/images.json
+RUN chmod 744 /etc/buildpacks/images.json