update circleci config

Sascha Braun · Sascha Braun · commit f2725f706966 · 2018-11-22T19:03:53.000+01:00
diff --git a/.circleci/config.yml b/.circleci/config.yml
@@ -5,6 +5,8 @@
 version: 2
 jobs:
   build:
+    docker:
+      - image: circleci/node:8.9.4
     steps:
       - checkout
 
