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Table of Contents
Understanding Remix and Containerization
Remix lets developers use React for both the backend and front end of their apps. Unlike regular React, where data is fetched on the client side, Remix fetches data on the server side before showing it on the screen.
Containerization is like packing up all the stuff an app needs to work into a single box. This box includes the app’s code, files, and libraries, so the app can run smoothly on any type of computer setup. It allows developers to write an app once and use it on any setup. This is super useful for making apps work well during development and with different vendors.
Preparing the Remix App for Production
Get your React Remix app ready to go live! Here are some things to do:
- Finish up your environment variables in the .env file.
- Add or change any variables or values.
- Make your Remix app ready for action by running
npm run build.
Docker and Containerization
This step plays a crucial role in deploying a React Remix app to Production with Docker Containerization.
Create a Docker Compose and Dockerfile that sets up a Node.js Alpine image. This image is where we’ll run our React Remix app.
Docker Compose Script to Deploy Remix App
Here’s a setup script in Docker Compose to launch your Remix app for production. Remember, feel free to tweak it based on what you need.
# // docker-compose.yml
container_name: site: Sets the name of the container to “site”
restart: always: Ensures that the container restarts automatically if it stops unexpectedly
build: .: This tells Docker where to find the stuff it needs to build the app. It expects the instructions for building the app (the Dockerfile) to be in the same directory.
ports: - 3000:3000: Maps port 3000 on the host machine to port 3000 inside the container. This means that if you access the application on the host, you’ll use port 3000.
Dockerfile to Hold Instructions for Deploying Remix App
Create a Dockerfile to hold the instructions for building a deploying the React Remix app to Production.
FROM node:18-alpine AS base
FROM base AS deps
RUN apk add --no-cache libc6-compat
COPY package.json package-lock.json ./
RUN npm ci
FROM base AS builder
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN npm run build && npm cache clean --force
FROM base AS runner
COPY --from=builder /app .
ENV PORT 3000
CMD ["npm", "run", "start"]
The Dockerfile sets up Node.js 18 Alpine image to prepare the environment for the Remix app. It uses
npm ci to cleanly install the dependencies. Then, it builds the app with
npm run build and starts it using
npm run start on port 3000.
Building and Pushing the Docker Image
Now, it’s time to build the Docker image. Just use this command to build and launch the container.
docker compose up --build -d site
This will get the Node image from the Docker registry and publish the React Remix app into a Docker container.
Check Docker Logs
Let’s look at the Docker container logs to make sure the app started without any problems!
Run the following command to get the logs:
docker logs site
Great news! The Remix app has started successfully!
Verify on Browser
Verify the app in the browser by opening this link: http://localhost:3000
You did it! Your React Remix app is now up and running in a Docker container.
Here’s a quick summary of Deploying a Remix App to Production with Containerization:
- Make a Docker Compose script with your Dockerfile
- Write a Dockerfile to get NodeJs Alpine and build the app
- Update the Dockerfile to build and launch the app
- Kick off the Docker container
- Check out your site in the browser
If your Docker service won’t start, take a look at this article. It could have some tips to help you get it working again.