Resolves the OTP-settings file path from OTP_SETTINGS_PATH, falling back to
the default Docker data path when the env var is unset or blank. A provided
override must be absolute so the portal and importer, which may run with
different working directories, resolve to the same shared file.
Returns string
The absolute OTP-settings file path.
Throws
ConfigurationError when OTP_SETTINGS_PATH is set to a non-absolute path.
Resolves the OTP-settings file path from
OTP_SETTINGS_PATH, falling back to the default Docker data path when the env var is unset or blank. A provided override must be absolute so the portal and importer, which may run with different working directories, resolve to the same shared file.