org-publish workflow

NOTICE: GitHub Pages services build and deploy from "main" branch and "docs/" directory.

1. git switch to the branch "main" with git switch main.
2. modify my website blog .org files.
3. Emacs org-publish will publish the changes with Emacs command [M-x org-publish RET <component> RET]. NOTE: [org-publish] you can only publish specify component instead of the whole website project.
4. git push the branch "main" source code file changes to the remote repository with:
   1. "git add ." (exclude org-publish exported destination dir "docs/")
   2. git commit -m "<your commit message>"
   3. git push origin main
5. git push the branch "main" destination file changes in "docs/" to remote repository with:
   1. "git add docs"
   2. git commit -m "<your commit message>"
   3. git push origin main
6. verify that the changes are live on the website at my blog.