Update to latest nodejs LTS. Improve Docker image layers.

Dockerfile

@@ -1,38 +1,36 @@
-FROM node:6.10-alpine
+FROM node:6.11-alpine
 MAINTAINER JD Conley <[email protected]>
 
 USER root
-ENV HOME=/home/pwhaas
+ENV SERVICE_ROOT=/home/pwhaas
 
 # Dependencies for building native components, and our user
 # tini is used for proper node signal handling
 RUN apk add --update --virtual .build-deps build-base python \
     && apk add --update tini \
-    && adduser -u 1001 -D -h $HOME -s /bin/false pwhaas
+    && adduser -u 1001 -D -h $SERVICE_ROOT -s /bin/false pwhaas
 
 # Put everything in the home dir and give our user ownership
-COPY . $HOME
-RUN chown -R pwhaas:pwhaas $HOME/*
+WORKDIR $SERVICE_ROOT
+COPY package.json package.json
+
+RUN npm install
+
+COPY . $SERVICE_ROOT
 
 # Build the app
 # Temporarily pull in the dev dependencies to do the typescript build
-USER pwhaas
-WORKDIR $HOME
-RUN npm install \
-    && npm run prep \
-    && npm run build \
-    && rm -rf node-modules \
+RUN npm run prep \
+    && rm -rf node_modules \
     && npm install --production \
-    && npm cache clean
-
-# Clean up the sources and build artifacts that aren't needed at runtime
-USER root
-RUN apk del .build-deps \
+    && npm cache clean \
+    && apk del .build-deps \
     && rm -rf /var/cache/apk/* \
-    && rm -rf $HOME/src \
-    && rm -rf $HOME/bin \
-    && rm -f $HOME/tsconfig.json \
-    && rm -f $HOME/tslint.json
+    && rm -rf $SERVICE_ROOT/src \
+    && rm -rf $SERVICE_ROOT/bin \
+    && rm -f $SERVICE_ROOT/tsconfig.json \
+    && rm -f $SERVICE_ROOT/tslint.json \
+    && chown -R pwhaas:pwhaas $SERVICE_ROOT
 
 # Open our port and start the app
 EXPOSE 3000