diff --git a/messages/JsonMessages/CharacterTexture.ts b/messages/JsonMessages/CharacterTexture.ts
index 055b3033..eb2ec15e 100644
--- a/messages/JsonMessages/CharacterTexture.ts
+++ b/messages/JsonMessages/CharacterTexture.ts
@@ -1,5 +1,10 @@
 import * as tg from "generic-type-guard";
 
+/*
+ * WARNING! The original file is in /messages/JsonMessages.
+ * All other files are automatically copied from this file on container startup / build
+ */
+
 export const isCharacterTexture = new tg.IsInterface()
     .withProperties({
         id: tg.isNumber,
diff --git a/messages/JsonMessages/MapDetailsData.ts b/messages/JsonMessages/MapDetailsData.ts
index 899506b7..ff18acc3 100644
--- a/messages/JsonMessages/MapDetailsData.ts
+++ b/messages/JsonMessages/MapDetailsData.ts
@@ -2,10 +2,10 @@ import * as tg from "generic-type-guard";
 import { isCharacterTexture } from "./CharacterTexture";
 import { isNumber } from "generic-type-guard";
 
-/*const isNumericEnum =
-    <T extends { [n: number]: string }>(vs: T) =>
-    (v: any): v is T =>
-        typeof v === "number" && v in vs;*/
+/*
+ * WARNING! The original file is in /messages/JsonMessages.
+ * All other files are automatically copied from this file on container startup / build
+ */
 
 export const isMapDetailsData = new tg.IsInterface()
     .withProperties({
diff --git a/messages/JsonMessages/RoomRedirect.ts b/messages/JsonMessages/RoomRedirect.ts
index 7257ebd3..1eb09937 100644
--- a/messages/JsonMessages/RoomRedirect.ts
+++ b/messages/JsonMessages/RoomRedirect.ts
@@ -1,5 +1,10 @@
 import * as tg from "generic-type-guard";
 
+/*
+ * WARNING! The original file is in /messages/JsonMessages.
+ * All other files are automatically copied from this file on container startup / build
+ */
+
 export const isRoomRedirect = new tg.IsInterface()
     .withProperties({
         redirectUrl: tg.isString,