🔧 Complete Docker template update runbook 🔧

Finish syncing generated Docker template files against upstream templates:
remove dead template-files ARGs from the Dockerfile, sync bin-script
boilerplate to the current shell/sh template, migrate the non-standard
rootfs/etc dir to rootfs/tmp/etc, fix a gitignore bug that silently dropped
rootfs/tmp/, correct the README license, and document the go-tools
toolchain-stage exception in the runbook.
- AI.md: document that language toolchain build stages (e.g. `FROM golang:alpine AS go-tools`)
are intentionally exempt from the PULL_URL/GEN_DOCKERFILE_APP_DIR org rule
- Dockerfile: remove dead DEFAULT_FILE_DIR/DEFAULT_DATA_DIR/DEFAULT_CONF_DIR/DEFAULT_TEMPLATE_DIR
ARGs and their mkdir usage — the template-files directory no longer exists
- README.md: fix stale license claim (MIT) to match the actual LICENSE.md (WTFPL)
- .gitignore: anchor the tmp/ pattern to /tmp/ so it stops silently swallowing
the required rootfs/tmp/ directory
- rootfs/etc/profile.d/go.sh -> rootfs/tmp/etc/profile.d/go.sh: migrate the
non-standard rootfs/etc dir to the tmp/etc convention (rootfs/root, rootfs/tmp,
rootfs/usr are the only valid rootfs root dirs; 03-files.sh copies tmp/etc/* at build time)
- rootfs/usr/local/bin/copy, rootfs/usr/local/bin/symlink: sync APPNAME
assignment to the current template style and add the missing trap '' EXIT line
- rootfs/usr/local/bin/healthcheck: sync APPNAME assignment and add the
missing trap '' EXIT line

AI.md
Dockerfile
.gitignore
README.md
rootfs/etc/profile.d/go.sh
rootfs/tmp/
rootfs/usr/local/bin/copy
rootfs/usr/local/bin/healthcheck
rootfs/usr/local/bin/symlink

Dockerfile

@@ -5,10 +5,6 @@ ARG BUILD_DATE="202605292219"
 ARG LANGUAGE="en_US.UTF-8"
 ARG TIMEZONE="America/New_York"
 ARG WWW_ROOT_DIR="/usr/local/share/httpd/default"
-ARG DEFAULT_FILE_DIR="/usr/local/share/template-files"
-ARG DEFAULT_DATA_DIR="/usr/local/share/template-files/data"
-ARG DEFAULT_CONF_DIR="/usr/local/share/template-files/config"
-ARG DEFAULT_TEMPLATE_DIR="/usr/local/share/template-files/defaults"
 ARG PATH="/usr/local/etc/docker/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
 
 ARG USER="root"
@@ -66,10 +62,6 @@ ARG EXPOSE_PORTS
 ARG BUILD_VERSION
 ARG IMAGE_VERSION
 ARG WWW_ROOT_DIR
-ARG DEFAULT_FILE_DIR
-ARG DEFAULT_DATA_DIR
-ARG DEFAULT_CONF_DIR
-ARG DEFAULT_TEMPLATE_DIR
 ARG DISTRO_VERSION
 ARG NODE_VERSION
 ARG NODE_MANAGER
@@ -118,7 +110,7 @@ COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
 
 RUN echo "Initializing the system"; \
   $SHELL_OPTS; \
-  mkdir -p "${DEFAULT_DATA_DIR}" "${DEFAULT_CONF_DIR}" "${DEFAULT_TEMPLATE_DIR}" "/root/docker/setup" "/etc/profile.d"; \
+  mkdir -p "/root/docker/setup" "/etc/profile.d"; \
   if [ -f "/root/docker/setup/00-init.sh" ];then echo "Running the init script";/root/docker/setup/00-init.sh||{ echo "Failed to execute /root/docker/setup/00-init.sh" >&2 && exit 10; };echo "Done running the init script";fi; \
   echo ""
 
@@ -229,10 +221,6 @@ ARG BUILD_VERSION
 ARG IMAGE_VERSION
 ARG GIT_COMMIT
 ARG WWW_ROOT_DIR
-ARG DEFAULT_FILE_DIR
-ARG DEFAULT_DATA_DIR
-ARG DEFAULT_CONF_DIR
-ARG DEFAULT_TEMPLATE_DIR
 ARG DISTRO_VERSION
 ARG NODE_VERSION
 ARG NODE_MANAGER