Build with --noBuildLock and clear a stale lock first

Hugo takes an flock on .hugo_build.lock at startup and waits for it
indefinitely with no message, no error and no timeout. The observed symptom
is a build that copies the static files and then stops: 66 files and 16 MB
in the staging tree, a sleeping process at near-zero CPU, low RSS, and no
further output. Reproduced exactly by holding the lock against an otherwise
healthy build.

The workspace is on NFS, where a lock left by an uncleanly killed build
outlives the process that took it, so this recurs on its own. The lock also
guards against a concurrent second build, which cannot happen here: the
container is the only builder and Rancher runs it start_once. It protects
nothing and fails invisibly.

Clear any stale lock file as well, so nothing is left lying around now that
Hugo no longer manages it.

Verified: with the lock held, the build now completes rather than hanging.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01X1AuLA5tHPwpD7Hp5utPkS

Author: Robbie1977

deploy.sh

@@ -37,7 +37,22 @@ cd "$SRC"
 
 # ---------------------------------------------------------------- build ------
 rm -rf "$STAGE"
-hugo --gc --minify --destination "$STAGE"
+
+# --noBuildLock, and a stale lock cleared first.
+#
+# Hugo takes an flock on .hugo_build.lock at startup and waits for it forever if
+# it cannot get one — no message, no error, no timeout. The symptom is a build
+# that copies the static files, then hangs: on 2026-08-05 that was ~66 files and
+# 16 MB in the staging tree, a sleeping process at near-zero CPU, and nothing
+# else for as long as anyone cared to wait.
+#
+# The workspace is on NFS, where a lock left behind by an uncleanly killed build
+# survives the process that took it. And the lock guards against a second
+# concurrent build, which cannot happen here: this container is the only builder
+# and Rancher runs it start_once. So it protects nothing and its failure mode is
+# an invisible hang.
+rm -f "$SRC/.hugo_build.lock"
+hugo --noBuildLock --gc --minify --destination "$STAGE"
 
 # ---------------------------------------------------------------- gates ------
 # Never publish an obviously broken build. The term corpus comes from an API