diff --git a/README.md b/README.md
index e5b0ca8..2fbbbbe 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,10 @@
 
 
 The backend of a bigdata market.
+
+
+## Usage
+
+env:
+- DATABASE_URL  example:"postgres://datamarket:datamarket@localhost:5432/datamarket?sslmode=disable"
+- SERVER_ADDR  default :8080
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