Merge pull request #171 from overleaf/jpa-fix-express-deprecations

[misc] fix express deprecations

services/real-time/app.js

@@ -68,7 +68,7 @@ app.get('/', (req, res) => res.send('real-time-sharelatex is alive'))
 
 app.get('/status', function (req, res) {
   if (Settings.shutDownInProgress) {
-    res.send(503) // Service unavailable
+    res.sendStatus(503) // Service unavailable
   } else {
     res.send('real-time-sharelatex is alive')
   }

services/real-time/app/js/HttpApiController.js

@@ -23,7 +23,7 @@ module.exports = {
         req.body
       )
     }
-    res.send(204)
+    res.sendStatus(204)
   },
 
   startDrain(req, res) {
@@ -32,7 +32,7 @@ module.exports = {
     rate = parseFloat(rate) || 0
     logger.log({ rate }, 'setting client drain rate')
     DrainManager.startDrain(io, rate)
-    res.send(204)
+    res.sendStatus(204)
   },
 
   disconnectClient(req, res, next) {