Introduce docker for web app

web/Dockerfile

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+FROM node:9-alpine as build
+COPY package.json package-lock.json ./
+RUN npm set progress=false \
+ && npm config set depth 0 \
+ && npm cache clean --force
+RUN npm i \
+ && mkdir /app \
+ && cp -R ./node_modules /app
+WORKDIR /app
+COPY . .
+RUN $(npm bin)/ng build --prod --build-optimizer
+
+FROM nginx:1.13.3-alpine
+RUN rm -rf /var/www/html/*
+COPY nginx/default.conf /etc/nginx/conf.d/
+COPY --from=build /app/dist /var/www/html
+CMD ["nginx", "-g", "daemon off;"]