What is rootDir?
rootDir is set to a root folder, that contains all your source files. If not specified, TS will automatically choose a suitable parent folder of all inputs. rootDir also determines the output directory.
What does the error mean?
My guess is you have an import statement for logging.ts somewhere in notifier-server:
import {logger} from "@teros-cli/logging" // or similar
Then logging.ts module will be automatically included by the compiler, regardless of include and exclude options in tsconfig.json. One way to check all included files is tsc --listFiles.
A tsconfig.json file outside notifier-server doesn’t help here. The compiler picks up exactly one config per tsc compilation and optionally pulls inherited configs. If it cannot find one in notifier-server project root (where you started tsc), only then the compiler searches upwards the parent directory chain, until a config is found.
Possible solutions
One fix is to just remove "rootDir": "src" from compiler options, so it gets set automatically. Caution: rootDir will then consider both projects as inputs!
Alternative: You can add a separate logging.ts module contained in notifier-server/src project and drop the external import.
Hope, that helps!