fix: rebase issues and code style

migrations/001-initial.js

@@ -2,14 +2,6 @@ const db = require('./db')
 
 exports.up = function (next) {
   var sqls = [
-    'create table server_logs ( ' +
-    'id uuid PRIMARY KEY, ' +
-    'device_id text, ' +
-    'log_level text, ' +
-    'timestamp timestamptz DEFAULT now(), ' +
-    'message text, ' +
-    'meta json)',
-
     'CREATE TABLE IF NOT EXISTS user_config ( ' +
     'id serial PRIMARY KEY, ' +
     'type text NOT NULL, ' +