[Feature] Give a easy start-guide for a new contributor, such as script(singe node deploy)

[lilei1128]

Cloudberry Database version

No response

What happened

give a script to deploy the cdb or give a docker image that is not need to install third-part libs.
I try to install but linux can not allocate much memory for cdb.

What you think should happen instead

No response

How to reproduce

commit a script or docker image.

Operating System

centos

Anything else

No response

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct.

[github-actions]

Hey, @lilei1128 welcome!🎊 Thanks for taking the time to point this out.🙌

[tuhaihe]

Hi @lilei1128 Thanks! We will inspect how to improve the existing doc. Now you can take this for a reference.