Update 'Dockerfile'

Dockerfile

@@ -1,13 +1,47 @@
-FROM node:8.6
+# Mutistaged Node.js Build
+FROM node:10-alpine as builder
+
+# Install system dependencies
+RUN set -ex; \
+    apk add --update --no-cache \
+    make gcc g++ git python
+
+# Copy package.json dependencies
+COPY server/package.json /app/server/package.json
+COPY server/package-lock.json /app/server/package-lock.json
+COPY client/package.json /app/client/package.json
+COPY client/package-lock.json /app/client/package-lock.json
+COPY shared/package.json /app/shared/package.json
+COPY shared/package-lock.json /app/shared/package-lock.json
+COPY zone-mta/package.json /app/zone-mta/package.json
+COPY zone-mta/package-lock.json /app/zone-mta/package-lock.json
+
+# Install dependencies in each directory
+RUN cd /app/client && npm install
+RUN cd /app/shared && npm install --production
+RUN cd /app/server && npm install --production
+RUN cd /app/zone-mta && npm install --production
 
-# First install dependencies
-COPY ./package.json ./app/
-WORKDIR /app/
-ENV NODE_ENV production
-RUN npm install --no-progress --production && npm install --no-progress passport-ldapjs passport-ldapauth
 # Later, copy the app files. That improves development speed as buiding the Docker image will not have
 # to download and install all the NPM dependencies every time there's a change in the source code
 COPY . /app
-EXPOSE 3000
+
+RUN set -ex; \
+   cd /app/client && \
+   npm run build && \
+   rm -rf node_modules
+
+# Final Image
+FROM node:10-alpine
+
+WORKDIR /app/
+
+# Install system dependencies
+RUN set -ex; \
+    apk add --update --no-cache \
+    pwgen netcat-openbsd bash imagemagick
+
+COPY --from=builder /app/ /app/
+
+EXPOSE 3000 3003 3004
 ENTRYPOINT ["bash", "/app/docker-entrypoint.sh"]
-CMD ["node", "index.js"]