How to use docker for Legato Application Framework?

If Vscode is used at your end, you can use the link Run leaf / VSCode in Windows environment without VM (Experimental) - VSCode - Legato Forum for reference.

your requirement will need a docker container running on your host and the Dev Container extension installed in your Vscode.
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Rest instructions are similar to the above link, tried it sometime back and it worked smoothly without any issues.