Relocate default config files to the core subdirectories
Changes:
- Natively support config file accessibility when image creation may sever context between the core code and a config file located in a parent directory
- Update Wiki path references
Directly addresses #238 (closed)
Unchanged: Provider config file location remains static, whereas Transformer config file location can still be set away from default location via environment variable or command rule.
Note: Build pipeline is failing until core-lib-gcp dependency issue is resolved. See issue here: #241 (closed)