build.sh: the source repo is overridable, and the build says which tree it used

The default is unchanged — the shared DooPlex clone the release runbook names. It is overridable
because that clone is SHARED: tonight another session had 30 files of work in progress in it, and
the clean-tree gate rightly forbids building over them. The way to ship is then a clean clone at
the pushed commit, not stashing somebody else's work.

The banner now prints the repo it built from, so an image is attributable to a tree as well as to
a commit. That matters more now that a version number can only be pushed once.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0117kRTSgs3rJWUFGxyoWN6Y

controller/build.sh

@@ -16,7 +16,11 @@
 set -euo pipefail
 
 # --- Configuration (edit these if your paths differ) ---
-REPO_DIR="/mnt/5_hdd/felhom.eu/git/felhom-controller"
+# The default is the shared DooPlex clone, and the release runbook names it. It is overridable
+# because that clone is shared: when another session has work in progress in it, the clean-tree gate
+# rightly forbids building over them, and the way to ship is a clean clone at the pushed commit —
+# not stashing somebody else's work. Set FELHOM_REPO_DIR to that clone.
+REPO_DIR="${FELHOM_REPO_DIR:-/mnt/5_hdd/felhom.eu/git/felhom-controller}"
 CONTROLLER_SRC="${REPO_DIR}/controller"
 WEBSITE_ASSETS_DIR="/mnt/5_hdd/felhom.eu/git/felhom.eu/website/assets"
 REGISTRY="gitea.dooplex.hu/admin"
@@ -61,6 +65,7 @@ info "║  felhom-controller image builder     ║"
 info "╚══════════════════════════════════════╝"
 info "Version:    ${VERSION}"
 info "Commit:     ${GIT_COMMIT}"
+info "Repo:       ${REPO_DIR}"
 info "Source:     ${CONTROLLER_SRC}"
 info "Build dir:  ${BUILD_DIR}"
 info "Image:      ${IMAGE}:${VERSION}"