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charm:tldr:ca795
The command "charm serve" is a command used in the context of Charm, which is a tool used in deploying and managing Juju charms (charm is a collection of scripts and metadata that represents a service).
When you run "charm serve" command, it starts a local HTTP server to serve your charm for development and testing purposes. It provides a way to locally serve the charm files and metadata, allowing you to test and interact with the charm without having to deploy it on a live environment.
By default, when you run "charm serve", it listens on the loopback interface on port 8080. You can access the served charm by navigating to http://localhost:8080 in your web browser.
This command is useful during the development process when you are making changes to a charm and want to quickly test and iterate on those changes locally before deploying it in a production environment.