Framework Default Ports

When configuring your container node, you'll need to set the port your app listens on. Use this table to find the default port for your framework.

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Node.js Python Go Java C# PHP Ruby Elixir Kotlin Rust

Framework	Default Port	Docs
Express	3000
Fastify	3000
NestJS	3000
Koa	none
Hapi	none

Framework	Default Port	Docs
Flask (Werkzeug)	5000
Django (Gunicorn)	8000
FastAPI (Uvicorn)	8000
Tornado	none

Framework	Default Port	Docs
Gin	8080
Echo	1323
Fiber	3000
Chi	none
net/http (stdlib)	none

Framework	Default Port	Docs
Spring Boot	8080
Quarkus	8080
Micronaut	8080
Vert.x	8888

Framework	Default Port	Docs
ASP.NET Core	5000
Minimal API	5000

Framework	Default Port	Docs
Laravel	8000
Symfony	8000
Slim	none

Framework	Default Port	Docs
Rails (Puma)	3000
Sinatra	4567

Framework	Default Port	Docs
Phoenix	4000

Framework	Default Port	Docs
Ktor	none
Spring Boot (Kotlin)	8080

Framework	Default Port	Docs
Actix-web	none
Axum	none
Rocket	8000
Warp	none