fix docker build

server.js

@@ -8,8 +8,6 @@ try {
 
 var path = require("path");
 var architect = require("architect");
-var optimist = require("optimist");
-var async = require("async");
 var os = require("os");
 var urls = require("c9/urls");
 var hostname = require("c9/hostname");
@@ -73,7 +71,9 @@ module.exports.getDefaultSettings = getDefaultSettings;
 
 function main(argv, config, onLoaded) {
     var inContainer = os.hostname().match(/-\d+$/);
-    
+    var optimist = require("optimist");
+    var async = require("async");
+
     var options = optimist(argv)
         .usage("Usage: $0 [CONFIG_NAME] [--help]")
         .alias("s", "settings")