| ``APP_MODE`` | ``development`` | Whether to use development or production settings |
| ``DB_DSN`` | | **Required.** Syntax: ``postgres://user:password@host:5432/db?sslmode=disable``. Only Postgres is supported. |
| ``DB_MAX_OPEN_CONNECTIONS`` | ``5`` | Maximum number of open connections to the database (https://pkg.go.dev/database/sql#DB.SetMaxOpenConns) |
| ``DB_MAX_IDLE_CONNECTIONS`` | ``2`` | Maximum number of connections in the idle connection pool (https://pkg.go.dev/database/sql#DB.SetMaxIdleConns) |
| ``DB_CONNECTION_MAX_LIFETIME`` | ``3m`` | Maximum amount of time a connection may be reused (https://pkg.go.dev/database/sql#DB.SetConnMaxLifetime) |
| ``API_SWAGGER_ENABLED`` | ``false`` | Enables the API documentation endpoints (e.g. ``/api/v1/swagger/index.html``, ``/api/v1/swagger/doc.json``) |
| ``API_SWAGGER_HOST`` | | Host (name or ip) serving the API (e.g. localhost:8080) |
| ``API_SWAGGER_SCHEMES`` | ``http,https`` | Comma-separated list of protocols |