GitLab

* [feature]: add requirements, update readme

* [feature]: add 3rd party placeholder

* [feature]: add lint ci

* [minor]: optimize dockerfile for fewer layer

* [feature]: add pre-commit lint, update readme for contribution guidance

* [minor]: fix run shell privileges

* [auto]: first lint without rule F, fix rule E

* [minor]: fix docker file error

Co-authored-by: gushiqiao <gushiqiao@sensetime.com>