[feature] set admin passcode

public/script.js

@@ -109,6 +109,15 @@ async function init() {
         });
     });
 
+    ws.on('private message', evt => {
+        write_message({
+            type: 'normal',
+            from: evt.sender,
+            msg: evt.data,
+            is_private: true,
+        });
+    })
+
     ws.on('command-block-reply', data => {
         write_message({
             type: 'command-block',

src/user.ts

@@ -149,7 +149,12 @@ export function find_user(filter_string_raw: string, users: Map<string, User>, o
 
 let admin_passcode: string;
 function refreash_admin_passcode() {
-    admin_passcode = Math.random().toString();
+    if (process.env.PASSCODE) {
+        admin_passcode = process.env.PASSCODE.toString();
+    } else {
+        admin_passcode = Math.random().toString();
+    }
+
     console.log('Admin passcode is:', admin_passcode);
     return admin_passcode;
 }