This is a quick and simple example of a Go application configured with a completely containerized dev environment. Features include Live Reloading, Remote Debugging, and a multi-layer containerized production build definition.
The included docker-compose configuration is set up to initialize a fully-featured dev environment utilizing Air for live-reloading and Delve for remote debugging.
> docker compose up -d
To facilitate debugging in VSCode, a launch configuration has been included that you can use to attach the VSCode debugger to the running dev environment.
To generate a release image, simply build the docker file. This utilizes a dedicated build stage along with the scratch Docker image to ensure the final image contains only the necessary resources and nothing else.
> docker build . -t go-template-web
> docker run -e HOST= -p 8080:8080 go-template-web
The application provided with this example is a lightweight web service hosting static files out of the ./public directory and templated responses out of the ./templates directory. It is also set up to utilize environment variables for application configuration. These can either be set directly in the execution environment, included as part of a docker-compose.yaml definition, or provided in a .env file in the execution directory. The .env file will always be overridden by other methods so is particularly useful for development. The service will also fall back to a default value if one is not otherwise provided.
| Variable | Description | Default |
|---|---|---|
HOST |
The host network that requests should be serviced from. | localhost |
PORT |
The port that hosts the configuration UI and aggregated feeds. | 80 |
HOST=
PORT=8080
This example code is provided to the public domain via the CC0 1.0 Universal License. See LICENSE.md for more information.