diff --git a/.env b/.env
deleted file mode 100644
index 54e001b..0000000
--- a/.env
+++ /dev/null
@@ -1 +0,0 @@
-SERVER_URL=http://localhost:8080
\ No newline at end of file
diff --git a/README.md b/README.md
index 62389bc..911b165 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ This repository contains okiba bin's front-end code. The web app is using codemi
 
 ## Usage
 
+Add server URL in `.env.local` with `VITE_SERVER_URL` key.
+
 ```shell
 // get deps
 $ pnpm install