Project boilerplate: Go + Gin + Docker + Air

A containerised Gin app boilerplate, with a containerised development environment using Air and Docker Compose.

Component	Choice
Language	Go
Framework	Gin
Hot Reloading	Air
Containerisation	Docker

Development

Install the dependancies:

This project uses Go mod, the official module manager, to handle Go modules in a portable way without having to worry about GOPATH.

go mod download
go mod verify

Define environment variables for your development environment:

These are passed to the Docker container via docker-compose.yaml in development. When running in production, the environment variables must be passed to the container when it is run.

cp .env.example .env
vim .env

Run locally:

This builds the Docker image and runs it automatically with the config defined in docker-compose.yaml. This saves you having to build the docker image and then run a manual docker run command with all the flags (for environment variables, ports, etc).

docker compose up

Production

Note: Environment variables are never baked into the image, or they wouldn't be environment variables. The production environment will start a Docker container based on this image, but it will have to pass the environment variables to the container when it runs it.

# Build Docker image for production:
docker build -t gin-air-docker-boilerplate -f Dockerfile.production .

# Example manually running a container with environment variables and ports defined:
docker run -p 8080:8080 -e SUPER_SECRET_KEY=abc123 gin-air-docker-boilerplate

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