Substitute ${VAR} and ${VAR:-default} references against an injected env record. A reference with no value and no default throws MissingEnvironmentVariableError — no silent fallbacks.
${VAR}
${VAR:-default}
Substitute
${VAR}and${VAR:-default}references against an injected env record. A reference with no value and no default throws MissingEnvironmentVariableError — no silent fallbacks.