message: Application docker file improvements
  Bump node to v10 LTS
  Using alpine version
  Add build tools (bunyan currently requires make to install)
diff: -FROM node:9
  +FROM node:10-alpine
  WORKDIR /usr/src/app
  @@ -10,8 +10,10 @@ HEALTHCHECK --interval=5s CMD node healthcheck.js
  COPY package.json .
  -RUN npm install --only=production --no-package-lock && \
  - npm cache clean --force
  +RUN apk --no-cache add --virtual build-dependencies build-base gcc python && \
  + npm install --only=production --no-package-lock && \
  + npm cache clean --force && \
  + apk del build-dependencies
  COPY . .
  