feat: i18n middleware

feat: i18n configuration.
feat: i18n with tenancy.

server/src/loaders/express.ts

@@ -2,20 +2,42 @@ import express from 'express';
 import helmet from 'helmet';
 import boom from 'express-boom';
 import errorHandler from 'errorhandler';
-import i18n from 'i18n';
 import fileUpload from 'express-fileupload';
+import i18n from 'i18n';
 import routes from '@/http';
+import config from '@/../config/config';
 
 export default ({ app }) => {
   // Express configuration.
   app.set('port', 3000);
 
+  // Helmet helps you secure your Express apps by setting various HTTP headers.
   app.use(helmet());
+
+  // Allow to full error stack traces and internal details 
   app.use(errorHandler());
+
+  // Boom response objects.
   app.use(boom());
+
+  // Parses both json and urlencoded.
   app.use(express.json());
+
+  // Handle multi-media requests.
   app.use(fileUpload({
     createParentPath: true,
   }));
-  routes(app);
+
+  // Initialize i18n node.
+  app.use(i18n.init)
+
+  // Prefix all application routes.
+  app.use(config.api.prefix, routes());
+
+  // catch 404 and forward to error handler
+  app.use((req, res, next) => {
+    const err = new Error('Not Found');
+    err['status'] = 404;
+    next(err);
+  })
 };