Running and Managing a Containerized Bun Application

on demand is a great way to manage the different runtimes and their dependencies. Also, as it's fairly a new runtime, getting a consistent development environment for Bun can be challenging. Docker can help you set up a consistent development environment for Bun. ## Get the sample application Clone the sample application to use with this guide. Open a terminal, change directory to a directory that you want to work in, and run the following command to clone the repository: ```console $ git clone https://github.com/dockersamples/bun-docker.git && cd bun-docker ``` You should now have the following contents in your `bun-docker` directory. ```text ├── bun-docker/ │ ├── compose.yml │ ├── Dockerfile │ ├── LICENSE │ ├── server.js │ └── README.md ``` In the Dockerfile, you'll notice that the `FROM` instruction uses `oven/bun` as the base image. This is the official image for Bun created by Oven, the company behind Bun. This image is [available on the Docker Hub](https://hub.docker.com/r/oven/bun). ```dockerfile # Use the Bun image as the base image FROM oven/bun:latest # Set the working directory in the container WORKDIR /app # Copy the current directory contents into the container at /app COPY . . # Expose the port on which the API will listen EXPOSE 3000 # Run the server when the container launches CMD ["bun", "server.js"] ``` Aside from specifying `oven/bun` as the base image, this Dockerfile also: - Sets the working directory in the container to `/app` - Copies the contents of the current directory to the `/app` directory in the container - Exposes port 3000, where the API is listening for requests - And finally, starts the server when the container launches with the command `bun server.js`. ## Run the application Inside the `bun-docker` directory, run the following command in a terminal. ```console $ docker compose up --build ``` Open a browser and view the application at [http://localhost:3000](http://localhost:3000). You will see a message `{"Status" : "OK"}` in the browser. In the terminal, press `ctrl`+`c` to stop the application. ### Run the application in the background You can run the application detached from the terminal by adding the `-d` option. Inside the `bun-docker` directory, run the following command in a terminal. ```console $ docker compose up --build -d ``` Open a browser and view the application at [http://localhost:3000](http://localhost:3000). In the terminal, run the following command to stop the application. ```console $ docker compose down ``` ## Summary In this section, you learned how you can containerize and run your Bun application using Docker. Related information: - [Dockerfile reference](/reference/dockerfile.md) - [.dockerignore file](/reference/dockerfile.md#dockerignore-file) - [Docker Compose overview](/manuals/compose/_index.md) - [Compose file reference](/reference/compose-file/_index.md) ## Next steps In the next section, you'll learn how you can develop your application using containers.

This section details how to run the sample Bun application using Docker Compose. It explains the Dockerfile instructions, including setting the base image, working directory, copying files, exposing ports, and running the server. It then guides on building and running the application using `docker compose up --build`, accessing it via a browser, and stopping it. It also demonstrates running the application in the background using the `-d` option and stopping it with `docker compose down`. The section concludes with a summary and pointers to related Docker documentation, setting the stage for developing applications using containers in the next section.