Docker deployment in Svelte

Introduction

Docker deployment helps you package your Svelte app so it runs the same everywhere. It makes sharing and running your app easy and reliable.

You want to share your Svelte app with others without setup problems.

You need to run your app on different computers or servers.

You want to keep your app environment consistent during development and production.

You want to deploy your app to cloud services that support Docker.

You want to isolate your app from other software on your machine.

Syntax

Svelte

FROM node:18-alpine
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
RUN npm run build
EXPOSE 5173
CMD ["npm", "run", "preview"]

FROM sets the base image with Node.js.

WORKDIR sets the folder inside the container.

Examples

Basic Dockerfile for a Svelte app using Node 18 Alpine image.

Svelte

FROM node:18-alpine
WORKDIR /app
COPY package.json ./
RUN npm install
COPY . .
RUN npm run build
EXPOSE 5173
CMD ["npm", "run", "preview"]

Uses npm ci for faster, clean installs with lockfile.

Svelte

FROM node:18-alpine
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci
COPY . .
RUN npm run build
EXPOSE 5173
CMD ["npm", "run", "preview"]

Sample Program

This Dockerfile builds and runs a Svelte app. It installs dependencies, builds the app, exposes port 5173, and starts the preview server.

Svelte

/* Dockerfile */
FROM node:18-alpine
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci
COPY . .
RUN npm run build
EXPOSE 5173
CMD ["npm", "run", "preview"]

Important Notes

Make sure your package.json has scripts for build and preview.

Use docker build -t my-svelte-app . to build the image.

Run with docker run -p 5173:5173 my-svelte-app to access the app in your browser at http://localhost:5173.

Summary

Docker packages your Svelte app with all it needs to run anywhere.

Write a Dockerfile to install, build, and run your app inside a container.

Use Docker commands to build and run your app container easily.