* examples/kubernetes: newly added
* docs/rootless.md: cleaned up for better readability
* examples/README.md: split out from the main README.md
* examples/build-using-dockerfile/README.md: split out from the main README.md
* README.md: add TOC using https://github.com/thlorenz/doctoc
* README.md: add mTLS configuration (relates to #1074)
* README.md: add more adoptions
* README.md: add inline cache (fix#976)
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>