Update docs for private app development (#762)
Update docs for private app development (#762)

* Update docs for private app development

Co-authored-by: Graham F. Scott <91886533ae9966b74d29a23eb54c4f06cf2ae0d4@users.noreply.github.com>
Shopify/themekit,Shopify/themekit,Shopify/themekit,Shopify/themekit