Add license to Cargo.toml

Author: dongresource

Cargo.toml

@@ -2,6 +2,7 @@
 name = "openfusionmap"
 version = "1.0.0"
 edition = "2021"
+license = "MIT"
 
 [dependencies]
 axum = { version = "0.8.1", features = ["ws"] }