Cache node_modules across builds

Dockerfile

FROM marianobe/node-base:latest
EXPOSE 3000 3001 3002

RUN npm install -g --unsafe-perm @angular/cli pushstate-server

RUN mkdir -p /usr/src/app/client
WORKDIR /usr/src/app

# Loopback app
COPY package.json /usr/src/app
COPY package-lock.json /usr/src/app
RUN cd /usr/src/app && npm ci

# Angular app
COPY ./client/package.json /usr/src/app/client
COPY ./client/package-lock.json /usr/src/app/client
RUN cd /usr/src/app/client && npm ci

COPY . /usr/src/app

WORKDIR /usr/src/app/client
RUN npm run build