diff --git a/README.md b/README.md
index d5630ea..b40fbec 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,13 @@ The first step is cloning this repo:
 ```shell
 git clone https://github.com/4rkal/shortr && cd shortr
 ```
+
+Edit the `docker-compose.yml` and set a base url:
+
+    command: ["/shortr", "--url", "YOUR_URL"]
+    
+Change the `YOUR_URL`, to the url where your app served from (eg app.4rkal.com)
+
 Now you can run the application via docker.
 
 ### Using docker