Dockerfile

# Multi-stage
# 1) Node image for building frontend assets
# 2) nginx stage to serve frontend assets

# Name the node stage "builder"
FROM node:14 AS builder
# Set working directory
WORKDIR /app
# Copy all files from current directory to working dir in image
COPY . .
# install node modules and build assets
RUN npm install && npm run build

# nginx state for serving content
FROM nginx:alpine
# Set working directory to nginx asset directory
WORKDIR /usr/share/nginx/html
# Remove default nginx static assets
RUN rm -rf ./*
# Copy static assets from builder stage
COPY --from=builder /app/build .
# Copy nginx config to replace the dafault configuration
COPY --from=builder /app/nginx.conf /etc/nginx/conf.d/default.conf
# Containers run nginx with global directives and daemon off
EXPOSE 3000
CMD ["nginx", "-g", "daemon off;"]


# Single-stage
# Use serve React static files with Express instead of Nginx

#FROM node:14

#WORKDIR /usr/src/app

#COPY . .

#RUN npm install && npm run build

#EXPOSE 3000
#CMD ["node", "index.js"]