mahjong_service/env.rs
pub const ENV_AUTH_JWT_SECRET_KEY: &str = "MAHJONG_JWT_SECRET";
pub const ENV_PG_URL: &str = "DATABASE_URL";
pub const ENV_LOGGER_LEVEL: &str = "MAHJONG_LOGGER_LEVEL";
pub const ENV_GITHUB_CLIENT_ID: &str = "GITHUB_CLIENT_ID";
pub const ENV_GITHUB_SECRET: &str = "GITHUB_SECRET";
pub const ENV_FRONTEND_URL: &str = "FRONTEND_URL";
pub const ENV_REDIS_URL: &str = "REDIS_URL";