SMD backend experiment

this is a backend which much similar to youtube.

Name		Name	Last commit message	Last commit date
Latest commit History 45 Commits
.vscode		.vscode
Public/Temp		Public/Temp
src		src
.gitattributes		.gitattributes
.gitignore		.gitignore
.prettierignore		.prettierignore
.prettierrc		.prettierrc
Readme.md		Readme.md
package-lock.json		package-lock.json
package.json		package.json
understanding.md		understanding.md

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