Env Config Reader

#!/usr/bin/env bash
set -euo pipefail

: "${APP_ENV:=development}"
: "${APP_PORT:=8080}"
: "${LOG_LEVEL:=info}"

print_config() {
	printf 'Environment: %s\n' "$APP_ENV"
	printf 'Port:        %s\n' "$APP_PORT"
	printf 'Log level:   %s\n' "$LOG_LEVEL"
}

print_config