add xo and lint all server files

.editorconfig

@@ -0,0 +1,7 @@
+[*]
+charset=utf-8
+end_of_line=lf
+trim_trailing_whitespace=true
+insert_final_newline=true
+indent_style=space
+indent_size=2

app.js

@@ -1,17 +1,18 @@
-var path = require('path')
+'use strict';
+const path = require('path');
 
-module.exports = function (agenda, options) {
-  options = options || {}
+module.exports = (agenda, options) => {
+  options = options || {};
   if (!options.middleware) {
-    options.middleware = 'express'
+    options.middleware = 'express';
   }
 
-  var agendash = require('./lib/agendash')(agenda, options)
+  const agendash = require('./lib/agendash')(agenda, options);
 
   try {
-    var middlewarePath = path.join(__dirname, 'lib/middlewares', options.middleware)
-    return require(middlewarePath)(agendash)
-  } catch (error) {
-    throw new Error('No middleware available for ' + options.middleware)
+    const middlewarePath = path.join(__dirname, 'lib/middlewares', options.middleware);
+    return require(middlewarePath)(agendash);
+  } catch (err) {
+    throw new Error('No middleware available for ' + options.middleware);
   }
-}
+};

bin/agendash-standalone.js

@@ -1,32 +1,30 @@
 #!/usr/bin/env node
+'use strict';
+const http = require('http');
+const Agenda = require('agenda');
+const express = require('express');
+const program = require('commander');
 
-var program = require('commander')
 program
   .option('-d, --db <db>', '[required] Mongo connection string, same as Agenda connection string')
   .option('-c, --collection <collection>', '[optional] Mongo collection, same as Agenda collection name, default agendaJobs', 'agendaJobs')
-  .option('-p, --port <port>', '[optional] Server port, default 3000', (n, d) => +n || d, 3000)
+  .option('-p, --port <port>', '[optional] Server port, default 3000', (n, d) => Number(n) || d, 3000)
   .option('-t, --title <title>', '[optional] Page title, default Agendash', 'Agendash')
-  .parse(process.argv)
+  .parse(process.argv);
 
 if (!program.db) {
-  console.error('--db required')
-  process.exit(1)
+  console.error('--db required');
+  process.exit(1);
 }
 
-var http = require('http')
-var express = require('express')
-var app = express()
+const app = express();
 
-var Agenda = require('agenda')
-var agenda = new Agenda().database(
-  program.db,
-  program.collection
-)
+const agenda = new Agenda().database(program.db, program.collection);
 app.use('/', require('../app')(agenda, {
   title: program.title
-}))
+}));
 
-app.set('port', program.port)
+app.set('port', program.port);
 
-var server = http.createServer(app)
-server.listen(program.port)
+const server = http.createServer(app);
+server.listen(program.port);