* [TD-12520]<docs>: refine docker documents.

* update taosadapter part

* remove manually launch taosadapter section

* update English version

* [TD-11980]<docs>: refine taosdemo docs

* fix param list

* refine param list

* Update docs.md
Co-authored-by: Nwu champion <cpwu@taosdata.com>

Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

del centos 6

* [TS-592]<fix>: doc taosdemo BOM error

* [TS-592]<fix>: doc taosdemo BOM error

修改P为p

* [TD-6420]<docs>: update README.md for apt-get install.

* add section to getting-started part.