add trust proxy

.env.example

@@ -9,3 +9,7 @@ ADMIN_EMAIL=john.doe@example.com
 
 SESSION_SECRET=
 SESSION_MEMCACHE_HOST=memcache:11211
+
+RATE_LIMIT=
+
+TRUST_PROXY=

index.js

@@ -11,6 +11,10 @@ const app = express();
 const routes = require('./routes');
 const middleware = require('./middleware');
 
+if (process.env.TRUST_PROXY != undefined) {
+    app.enable('trust proxy', '*');
+}
+
 app.use(middleware);
 app.use(routes);
 app.use(express.static('public'));