patch char name length by create

Dockerfile

@@ -74,6 +74,14 @@ RUN node /tmp/patch-custom-game.js /app
 COPY docker/patch-auto-verify-email.js /tmp/patch-auto-verify-email.js
 RUN node /tmp/patch-auto-verify-email.js /app
 
+# Local patch: make the minimum length for newly created character names
+# configurable (docker/patch-character-name-length.js). Upstream rejects names
+# shorter than 4 at creation, while rename/chat already accept 1-12; options
+# .character_name_min_length defaults to 4 and can be set to 3 in
+# files/config/options.js to allow 3-character names at creation.
+COPY docker/patch-character-name-length.js /tmp/patch-character-name-length.js
+RUN node /tmp/patch-character-name-length.js /app
+
 # Local patch: make the Steam/MAS auth-id requirement for tutorial and class
 # rewards optional (docker/patch-tutorial-reward-auth.js). Controlled at runtime
 # by options.tutorial_reward_requires_auth_id.