prefix support added

Author: Alexander Zolotarov

app.js

@@ -36,6 +36,10 @@ fs.readdirSync('./routes').forEach(function(file) {
     require(route)(app, db);
 });
 
+//set prefix
+if(config.prefix) {
+  app.use(config.prefix, app._router);
+}
 
 function getIndexParams() {
     let params = [];

config.json

@@ -1,3 +1,4 @@
 {
-  "port": 8500
+  "port": 8500,
+  "prefix": "/api/v1"
 }