diff --git a/.env.example b/.env.example
index 20bcd7cc..f5a60b2b 100644
--- a/.env.example
+++ b/.env.example
@@ -35,6 +35,13 @@ APP_KEY=
 APP_URL=http://localhost
 
 
+# If you want to serve js assets from a CDN (like https://cdn.example.com),
+# you need to set this custom URL here.
+# Otherwise, this should be the exact same value as APP_URL.
+
+ASSET_URL=http://localhost
+
+
 # The domain subdirectory from which you want to serve 2FAuth.
 # This must reflect the path targeted by APP_URL.
 #
diff --git a/Dockerfile b/Dockerfile
index 3da1cbbe..dc05844c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -124,6 +124,10 @@ ENV \
     # This variable must match your installation's external address.
     # Webauthn won't work otherwise.
     APP_URL=http://localhost \
+    # If you want to serve js assets from a CDN (like https://cdn.example.com),
+    # you need to set this custom URL here.
+    # Otherwise, this should be the exact same value as APP_URL.
+    ASSET_URL=http://localhost \
     # Turn this to true if you want your app to react like a demo.
     # The Demo mode reset the app content every hours and set a generic demo user.
     IS_DEMO_APP=false \
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 62141e60..66cfaf32 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -24,6 +24,10 @@ services:
       # This variable must match your installation's external address.
       # Webauthn won't work otherwise.
       - APP_URL=http://localhost
+      # If you want to serve js assets from a CDN (like https://cdn.example.com),
+      # you need to set this custom URL here.
+      # Otherwise, this should be the exact same value as APP_URL.
+      - ASSET_URL=http://localhost
       # Turn this to true if you want your app to react like a demo.
       # The Demo mode reset the app content every hours and set a generic demo user.
       - IS_DEMO_APP=false