Merge pull request #1322 from sharelatex/csh-issue-1309-node-6.15.1

Bump node to 6.15.1

GitOrigin-RevId: 7ae516d1231cd79baf0ff29768768a53b1f5f080

services/web/.nvmrc

@@ -1 +1 @@
-6.9.5
+6.15.1

services/web/docker-compose.yml

@@ -5,7 +5,7 @@ volumes:
 
 services:
   test_acceptance:
-    image: node:6.9.5
+    image: node:6.15.1
     volumes:
       - .:/app
     working_dir: /app