$ touch docker/db/env
$ vi docker/db/env
TZ=Asia/Tokyo
MYSQL_DATABASE=example
MYSQL_USER=example
MYSQL_PASSWORD=example
MYSQL_ALLOW_EMPTY_PASSWORD=yes
MYSQL_ROOT_PASSWORD=example

$ docker-compose up -d --build

$ docker-compose exec server sh
$ go install

$ go run main.go

$ air -c .air.toml

$ docker-compose exec client sh
$ yarn
$ yarn dev