It corrupts environment on macOS runner because it uses shell, not docker-executor,
and makes all tree read-only for a non-root user.
+ Replace examples with real files in example README.md
This example shows how to use ESP-IDF build system features to build
multiple configurations of an app from the same source files.
Configurations are set by overriding SDKCONFIG_DEFAULTS variable when
invoking idf.py.
Related: https://github.com/espressif/esp-idf/issues/5658