docs: FIX forgot to commit and push vendor dir for syntax highlight

vendor/fetch.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+# Re-download the vendored highlight.js ES modules.
+#
+# Run by hand when bumping HLJS_VERSION; the result is committed to git. This is
+# deliberately NOT part of the Docker build — baking the files into the image is
+# what keeps the app free of any network dependency at runtime.
+set -euo pipefail
+
+HLJS_VERSION="${HLJS_VERSION:-11.9.0}"
+BASE="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/${HLJS_VERSION}/es"
+DEST="$(cd "$(dirname "$0")" && pwd)/hljs"
+
+# Keep this list in sync with LANGS in app.py.
+LANGS=(accesslog apache bash cpp css diff dockerfile go graphql http ini 
+       java javascript json markdown nginx php powershell python rust sql 
+       typescript xml yaml)
+
+mkdir -p "$DEST/languages"
+echo "highlight.js ${HLJS_VERSION} -> $DEST"
+
+curl -fsS "$BASE/core.min.js" -o "$DEST/core.min.js"
+printf '  %-14s %6s bytes\n' core.min.js "$(wc -c < "$DEST/core.min.js")"
+
+for lang in "${LANGS[@]}"; do
+  curl -fsS "$BASE/languages/${lang}.min.js" -o "$DEST/languages/${lang}.min.js"
+  printf '  %-14s %6s bytes\n' "$lang" "$(wc -c < "$DEST/languages/${lang}.min.js")"
+done
+
+echo "total: $(du -sh "$DEST" | cut -f1) in $(find "$DEST" -type f | wc -l) files"