Defang Samples
April 4, 2026 ยท View on GitHub
Samples to show you how to develop, deploy, and debug cloud applications with Defang.
Browse through the ./samples directory, or search and browse in the docs.
Adding Samples
To start working on a new sample, run . ./scripts/new-sample from the root of the repository. This will create a new sample directory, with some basic scaffolding to get you started. Look for #REMOVE_ME_AFTER_EDITING in your new project to look for things that you should probably be changing/checking per sample. Feel free to remove files, like compose.dev.yaml if they aren't necessary for your sample.
Testing Samples
When you add a new sample, make sure to add any config vals to the deploy-changed-samples.yml workflow. They need to be prefixed with TEST_ and those values need to be set in the repo secrets. NOTE at the moment test break if we have a config value that only shows up in string interpolation in a longer string, for example in ENV_NAME: proto://user:${PASSWORD}@host if PASSWORD only ever shows up in that longer string, it will break the test. A workaround is to just add a line with PASSWORD: in the environment section, so the test can pick it up. Ugly, but works for now.
Available Samples
| Sample | Description | Tags | Languages |
|---|---|---|---|
| Agentic Autogen | An Autogen agent application using Mistral and FastAPI, deployed with Defang. | Agent, Autogen, Mistral, FastAPI, Vite, React, Python, JavaScript, AI | Python, JavaScript |
| Agentic LangGraph | A LangGraph Agent application that can use tools, deployed with Defang. | Agent, LangGraph, LangChain, AI, OpenAI, Tavily | TypeScript |
| Agentic Strands | A Strands Agent application, deployed with Defang. | Python, Flask, Strands, AI, Agent | Python |
| Angular & Node.js | A full-stack application using Angular for the frontend and Node.js with Socket.IO for the backend, containerized with Docker. | Angular, Node.js, Socket.IO, TypeScript, JavaScript | nodejs |
| Arduino Flask Wifi Server | An Arduino wifi server built with Flask. | Arduino, Flask, Python, IoT, Wifi, Serial | python |
| BullMQ & BullBoard & Redis | A sample project with BullMQ, BullBoard, and Redis. | BullMQ, BullBoard, Redis, Express, Node.js, Message Queue, JavaScript | nodejs |
| Crew.ai Django Sample | A sample application that uses Crew.ai to summarize text in a background task, streamed to the user in real-time. | Django, Celery, Redis, Postgres, AI, ML | Python |
| C# & ASP.NET Core | A simple task manager application using C# and ASP.NET Core. | ASP.NET Core, JavaScript, C# | C# |
| Django | A simple Django app that uses SQLite as the database. | Django, SQLite, Python | python |
| Django Celery | A Django application that uses Celery for background tasks, Postgres as the database, and Redis as the message broker. | Django, Celery, Postgres, Redis | python, sql |
| Django Channels & Redis & Postgres | A basic configuration of Django Channels with Redis and Postgres demonstrating a simple chat application. | Django, Channels, Redis, Postgres, Chat, Application | Python |
| Django & PostgreSQL | A customer relationship management list project developed using the Python Django framework, offering a starting point to help you quickly build your customer management system. | Django, PostgreSQL, Python, SQL | python |
| Django | A simple Django app that uses SQLite as the database. | Django, SQLite, Python, Railpack | python |
| Elysia & Bun | A basic Elysia app running on Bun with Defang. | Bun, Elysia, TypeScript, JavaScript | nodejs |
| FastAPI | A sample project demonstrating how to deploy FastAPI with Defang. | FastAPI, OpenAPI, Python | python |
| FastAPI & PostgreSQL | A sample project with FastAPI and PostgreSQL. | FastAPI, PostgreSQL, Python, SQL | python |
| FastAPI Postgres Pub/Sub | FastAPI sample that stores messages in Postgres and streams them to two app instances via LISTEN/NOTIFY. | FastAPI, PostgreSQL, WebSockets, PubSub | Python, SQL |
| Feathers.js | A sample project demonstrating how to deploy a Feathers.js application using Defang. The application displays "DefangxFeathersjs" on the webpage. | Feathers.js, Node.js, JavaScript | nodejs |
| Flask | A basic Flask to-do app. | Flask, Python | python |
| Flask | A basic Flask to-do app. | Flask, Python, Railpack | python |
| Go HTTP Server | A simple Go application that echoes back the request. | Go, HTTP | golang |
| Go HTTP Form | A simple Go application that demonstrates form submission using the net/http library. | Go, HTTP | golang |
| Go HTTP Form | A simple Go application that demonstrates form submission using the net/http library. | Go, HTTP, Railpack | golang |
| Go & MongoDB | A simple Go application that manages tasks with MongoDB. | Go, MongoDB, Atlas, Task Manager | golang |
| Go & OpenAI | A simple Go application that interacts with the OpenAI API. | Go, OpenAI, ChatGPT | golang |
| Go & REST API | A simple Go application that fetches fiscal data from an API. | Go, HTTP, Fiscal Data, REST API | golang |
| Go & S3 | A simple Go application that uploads and downloads files from AWS S3. | Go, S3, AWS | golang |
| Go & Slack API | A simple Slackbot that posts messages to a Slack channel. | Go, Slack, Bot | golang |
| Google ADK | A simple sample demonstrating how to deploy agents build with Google ADK to Defang. | Google ADK, Python, Agents | python |
| Hasura & PostgreSQL | A sample project demonstrating how to deploy Hasura with Defang and connect it to a PostgreSQL database. | Hasura, GraphQL, PostgreSQL, Database | SQL, GraphQL |
| HTML & CSS & JavaScript | A simple HTML, CSS and JavaScript website running on Defang. | HTML, CSS, JavaScript, Frontend | nodejs |
| Huginn | A system for building agents that perform automated tasks for you online. | Huginn, Agents, Automation | Dockerfile |
| ImgProxy | A fast and secure standalone server for resizing and converting remote images | Imgproxy, Images, Server | N/A |
| Javalin | A short hello world application demonstrating how to deploy Javalin onto Defang. | Javalin, Java, Maven | java |
| Jupyter & Postgres | This sample shows you how to spin up a postgres database and a Jupyter notebook server. | Jupyter, Postgres, Database | Python, SQL |
| LangChain & Flask | A sample project demonstrating how to deploy LangChain with Flask on Defang. | LangChain, Flask, AI, Python | python |
| Managed LLM | An app using Managed LLMs with Defang's OpenAI Access Gateway. | LLM, OpenAI, Python, Bedrock, Vertex | Python |
| Managed LLM with Docker Model Provider | An app using Managed LLMs with a Docker Model Provider, deployed with Defang. | LLM, Python, Bedrock, Vertex, Docker Model Provider | Python |
| Mastra & Next.js | An AI-powered tool for chatting with GitHub repositories using Mastra and Google Gemini. | AI, GitHub, Mastra, Next.js, PostgreSQL, TypeScript | TypeScript, JavaScript, Docker |
| Mastra & Next.js & PostgreSQL & Redis | A multi-service Mastra support and ops copilot with background jobs, PostgreSQL, Redis, and managed LLM access. | Mastra, Next.js, PostgreSQL, Redis, BullMQ, AI, Agents, Support, Operations | TypeScript, JavaScript, Docker |
| Model Context Protocol (MCP) Chatbot | An MCP (Model Context Protocol) chatbot assistant built with Next.js, Python, and Anthropic Claude. | MCP, Next.js, Python, Quart, Claude, AI, Anthropic, TypeScript, React, JavaScript | nodejs, python |
| Metabase & PostgreSQL | A simple Metabase configuration with a PostgreSQL database. | Metabase, PostgreSQL, Analytics, Database | SQL |
| n8n | A n8n app running on Defang. | n8n, PostgreSQL, Docker | Docker, Shell |
| Next.js | A basic Next.js app. | Next.js, React, Docker, Node.js, TypeScript, JavaScript, Static | nodejs |
| Next.js Blog | A starter project developed using Next.js designed to make it easy to launch a blog. | Next.js, Blog, Node.js, React, MDX, TypeScript, JavaScript | nodejs |
| Next.js & Claude | A fun chatbot created with Next.js and Claude. | Next.js, TypeScript, React, JavaScript, Chatbot, Claude, AI, Anthropic | TypeScript |
| Next.js CV | A Next.js web app that displays a minimalist CV. | Next.js, React, TypeScript, JavaScript | nodejs |
| Nextra | A documentation starter project developed using Nextra designed to streamline the creation of your documentation. | Next.js, Documentation, Nextra, Knowledgebase, Node.js, JavaScript, TypeScript | nodejs |
| Next.js & Postgres | A sample Next.js application that uses Postgres as a database. | Next.js, Postgres, Database, Node.js | TypeScript, JavaScript |
| Next.js | A basic Next.js app. | Next.js, React, Node.js, TypeScript, JavaScript, Static, Railpack | nodejs |
| NocoDB | An open source alternative to AirTable. | NocoDB | Dockerfile |
| Node.js & SocketIO | A minimal chat application that shows how to use Socket.IO with Node.js. | Node.js, Chat, Socket.IO, JavaScript | nodejs |
| Node.js & Express | A Node.js application that inspects and displays detailed information about incoming HTTP requests. | Node.js, Express, HTTP, Request, Inspector, JavaScript | nodejs |
| Node.js Express Form | A Node.js application that handles form submissions using the Express framework. | Node.js, Express, HTTP, JavaScript | nodejs |
| Node.js HTTP Server | A simple Node.js application that creates an HTTP server. | Node.js, HTTP, Server | nodejs |
| Node.js & OpenAI | A simple Node.js application that interacts with the OpenAI API. | Node.js, OpenAI, API, JavaScript | nodejs |
| Node.js & React & PostgreSQL | A full-stack to-do list application. | Node.js, React, Full-stack, PostgreSQL, JavaScript, SQL | nodejs |
| Node.js & REST API | A simple Node.js application that creates a REST API and fetches data from the U.S. Department of the Treasury's Fiscal Data API. | Node.js, REST API, JavaScript | nodejs |
| Node.js & S3 | A simple Node.js application that uploads and downloads files from AWS S3. | Node.js, S3, AWS, JavaScript | nodejs |
| Nounly | A URL shortener website built with Go, JavaScript, and Redis. | Go, JavaScript, Redis, URL shortener | golang, javascript |
| Ollama | Ollama is a tool that lets you easily run large language models. | AI, LLM, ML, Llama, Mistral, Next.js, AI SDK, | Typescript |
| Phoenix & PostgreSQL | A sample Phoenix application that uses a PostgreSQL database. | Phoenix, PostgreSQL, Database, Elixir | Elixir |
| Platformatic | A sample project showcasing a simple Platformatic service with Docker deployment. | Platformatic, Defang, Docker, Node.js, Service, JavaScript | nodejs |
| Pulumi | A basic Pulumi example. | Pulumi, Node.js, HTTP, Server, TypeScript | nodejs |
| Pulumi & Remix & PostgreSQL | A full-stack example using Remix, Prisma, and Aiven. | Full-stack, Remix, Prisma, Aiven, PostgreSQL, Pulumi, Node.js, TypeScript, SQL | nodejs |
| Python & Form | A short Python example for form submission in Flask. | Python, Flask, Form | python |
| Python & Implicit & GPU | A Music Recommendation API that provides artist recommendations based on collaborative filtering using the ALS algorithm from the Implicit library, leveraging a GPU. | Music, Recommendation, API, Collaborative Filtering, Implicit, GPU, Python | python |
| Python & Flask & HTTP | A Flask application that inspects and returns detailed information about HTTP requests. | Flask, HTTP, Python | python |
| Python & Flask & OpenAI | An app that demonstrates how to use the OpenAI API with Python and Flask. | Python, Flask, OpenAI, AI, Python | python |
| Python & REST API | A Flask application that fetches average interest rates from the Fiscal Data Treasury API. | Flask, REST API, Python | python |
| Python & Flask & AWS S3 | An app that demonstrates how to upload and download files from AWS S3 using Python and Flask. | Python, Flask, AWS, S3 | python |
| Ruby on Rails | A basic member list project developed using Ruby on Rails. | Ruby, Rails | Ruby |
| React | A minimal React app running on Defang. | React, Vite, JavaScript, Frontend | JavaScript |
| React | A minimal React app running on Defang. | React, Vite, JavaScript, Frontend, Railpack | JavaScript |
| Redis & JavaScript | A Redis and JavaScript application, deployed with Defang. | Redis, JavaScript | JavaScript |
| Rocket | A simple Rocket app. | Rocket | Rust |
| Sails.js | A short hello world application demonstrating how to deploy Sails.js onto Defang. | Sails.js, Node.js | nodejs |
| Sails.js & PostgreSQL | A sample project demonstrating how to deploy a project with PostgreSQL and Sails.js. | PostgreSQL, Sails.js, SQL, JavaScript | nodejs |
| Svelte & Node.js & MySQL | A full-stack application using Svelte for the frontend, Node.js for the backend, and MySQL for the database. | Svelte, Node.js, MySQL, Full-stack, JavaScript, TypeScript, SQL | nodejs |
| SvelteKit | A minimal SvelteKit app running on Defang. | SvelteKit, TypeScript, JavaScript, Svelte, Node.js, Frontend, TypeScript, JavaScript | nodejs |
| SvelteKit & MongoDB | A full-stack application using SvelteKit for the frontend and MongoDB for the database. | SvelteKit, MongoDB, Full-stack, Node.js, JavaScript | nodejs |
| Mistral & vLLM | Deploy Mistral with a custom UI using vLLM. | Mistral, vLLM, AI, Nextjs, GPU, Node.js, TypeScript, JavaScript | nodejs |
| Vue.js | A minimal Vue.js app running on Defang. | Vue.js, Vite, Node.js, Frontend, JavaScript | nodejs |
This list is auto-generated. Run node scripts/generate-samples-list.js to update.