Dockerise React with NGNIX

Dockerfile

# Stage 1 - Install dependencies & build react assets
FROM node:14-alpine@sha256:0c80f9449d2690eef49aad35eeb42ed9f9bbe2742cd4e9766a7be3a1aae2a310 AS build

WORKDIR /usr/src/app

ENV NODE_ENV=production

COPY package*.json /usr/src/app/
RUN npm i -g npm@7.20.0 
# mount a secret i.e. a custom nprc for private repos to be used for the npm clean install command only
RUN --mount=type=secret,mode=0644,id=npmrc,dst=/usr/src/app/.npmrc npm ci --only-production
COPY ./ /usr/src/app
RUN npm run build-react

# Stage 2 - Serve React assets via NGNIX
FROM nginx:1.21.1-alpine@sha256:23f08ba26a92a00d7368310ab3b4c46907feeebd485f716740e391aa90ad5904

WORKDIR /usr/src/app
COPY --from=build /usr/src/app/build /usr/share/nginx/html
COPY nginx.conf /etc/nginx/conf.d/nginx.conf
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]

ngnix.conf

#src: https://gkedge.gitbooks.io/react-router-in-the-real/content/nginx.html

server {
    # Nginx to listen to network packets at port 80 on IPv4 only
    listen 80 default_server;

    # react static assets location
    root /usr/share/nginx/html;
    index index.html;

    location ~* \.(?:manifest|appcache|html?|xml|json)$ {
      expires -1;
    }

    # First attempt to serve request as file, then as directory, then fall back to HTTP response with a 404 status.
    # Includes cache expiry defaults for assets
    location ~* \.(?:css|js)$ {
      try_files $uri =404;
      expires 1y;
      access_log off;
      add_header Cache-Control "public";
    }

    # Any route containing a file extension (e.g. /devicesfile.js)
    location ~ ^.+\..+$ {
      try_files $uri =404;
    }

    # Any route that doesn't have a file extension (e.g. /devices)
    location / {
        try_files $uri $uri/ /index.html;
    }
}