The `Makefile` has been configured to facilitate the build and execution of Docker with the `--build-arg` argument, which passes the `DOCKER_ENV` environment variable to determine the environment. This variable is read from the .env file:
`--build-arg DOCKER_ENV=${DOCKER_ENV}`: This variable is used to determine the execution environment (`local` or `production`), affecting both the binary build process and the container's behavior.
If `DOCKER_ENV` is set to `production` it should execute the binary, whereas if set to `local` it will install and run with `air` to enable reloads during development, among other things.