Merge pull request #12 from boxp/renovate/node-8.x

Update Node.js to v8.15

Author: boxp

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:8.14-alpine as npm
+FROM node:8.15-alpine as npm
 RUN mkdir -p /usr/src/app
 COPY . /usr/src/app
 WORKDIR /usr/src/app