chore: multi-stage Docker Needle build and trim MenuScene dist assets

Build MenuScene in Docker; ignore dist in context; remove bundled dist chunks;
update MenuScene index and MenuController bob defaults.

Made-with: Cursor

.dockerignore

@@ -14,9 +14,12 @@ MemoryCaptures/
 Recordings/
 obj/
 
-# Host-side Node (not needed when image serves pre-built dist)
+# Host-side Node (fresh install in the builder stage)
 **/node_modules/
 
+# Rebuilt inside the Docker builder; omit from context for smaller/faster uploads
+Needle/*/dist/
+
 # OS
 .DS_Store
 Thumbs.db