update to node 10.21.0

services/docstore/.nvmrc

@@ -1 +1 @@
-10.19.0
+10.21.0

services/docstore/Dockerfile

@@ -2,7 +2,7 @@
 # Instead run bin/update_build_scripts from
 # https://github.com/sharelatex/sharelatex-dev-environment
 
-FROM node:10.19.0 as base
+FROM node:10.21.0 as base
 
 WORKDIR /app
 

services/docstore/docker-compose.yml

@@ -6,7 +6,7 @@ version: "2.3"
 
 services:
   test_unit:
-    image: node:10.19.0
+    image: node:10.21.0
     volumes:
       - .:/app
     working_dir: /app
@@ -17,7 +17,7 @@ services:
     user: node
 
   test_acceptance:
-    image: node:10.19.0
+    image: node:10.21.0
     volumes:
       - .:/app
     working_dir: /app