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Summary: Learn step-by-step how to deploy a Next.js SSR application using Caddy instead of NGINX within a Docker container. Ideal for intermediate users looking to optimize their deployment setup.
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How to Deploy Next.js SSR with Caddy Instead of NGINX in Docker?

Deploying a Next.js Server-Side Rendering (SSR) application usually involves using NGINX as a reverse proxy, but Caddy offers an interesting alternative. Caddy simplifies many configurations and provides useful features out of the box. In this guide, we'll walk you through deploying a Next.js SSR application with Caddy in a Docker container.

Prerequisites
Before you start, ensure you have the following installed:

Node.js and npm

Docker and Docker Compose

Basic understanding of Docker and Next.js

Step 1: Setting Up Your Next.js Application

First, create a Next.js application if you don't already have one:

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Navigate to the project directory:

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Step 2: Create a Dockerfile

In your Next.js project, create a Dockerfile to containerize your app:

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This Dockerfile uses Node.js version 14, installs your dependencies, builds the app, and sets the container to run the Next.js server.

Step 3: Create a Caddyfile

Caddy simplifies configurations by using its Caddyfile. Create a Caddyfile in the root directory of your Next.js project:

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This configuration tells Caddy to listen on port 80 and proxy requests to the Next.js server running on port 3000.

Step 4: Create a Docker Compose File

Now, create a docker-compose.yml file to define and run multi-container Docker applications:

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This file defines two services:

next-app which builds the Next.js app.

caddy which runs the Caddy server and handles incoming HTTP requests, forwarding them to the Next.js app.

Step 5: Build and Run the Docker Containers

Build and run your Docker containers using Docker Compose:

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Docker will build the Next.js application and the Caddy server, then start both services. Caddy will handle incoming requests on port 80 and proxy them to your Next.js server running inside the Docker container.

Conclusion

Deploying a Next.js SSR application with Caddy instead of NGINX offers simpler configuration and potentially easier maintenance. By using Docker and Docker Compose, you can easily manage and deploy your application in a consistent environment. Give Caddy a try and see how it simplifies reverse proxy configuration in your Next.js projects!