How to add new functions to a package and update the docs

Hi Julia community,

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I went through the steps to create a new Julia package and that was successful. I also pushed it to GitHub (it's private for now since there is nothing of use in it). My next step in the process is to add one new function and update the documentation. Once I figure that step out I believe I should be good to go for adding new functions and converting the package to public. However, I am having a hard time finding a video or online help to show me how to update the package documentation when new functions are added. Can anyone point me to a good resource on that?