General improvements

Invoices page: Improvements to detailed invoices make it easier to determine how much each resource costs.

Server create date: The server page shows when you deployed the server.

Credentials: We've improved how credentials are shown in the dashboard, and now show which SSH keys the server was deployed with. There's also a one-liner you can quickly copy to log in to your server.

Hostname edit: You can now edit the hostname of a server from the server details page and through the API.