move env file to etc folder

did_router/src/database.rs

@@ -1,8 +1,9 @@
 use diesel::prelude::*;
 use diesel::pg::PgConnection;
 use diesel::result::Error;
-use dotenvy::dotenv;
+use dotenvy::{from_path};
 use std::env;
+use std::path::Path;
 use serde::{Serialize};
 use diesel_derive_enum::DbEnum;
 use std::str::FromStr;
@@ -49,7 +50,8 @@ pub struct NewDid<'a> {
 }
 
 pub fn connect() -> PgConnection {
-    dotenv().ok();
+    let env_path = Path::new("/etc/did_router.conf");
+    from_path(env_path).expect("env file missed");
 
     let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
     PgConnection::establish(&database_url)