Depot Packages

The new depot packaging system is great, but the current set of available packages is rather limited, especially when it comes to binary packages. I'd like this to change, and I'd be happy to be involved, but I don't know what to do, so could someone please answer the following questions:

Are there plans to provide a complete set of pre-built packages (including for x86_64) to the online repo?

How do I make my own repo publicly available? I have built most of the packages myself, and have published them locally, but I need to upload them. Can I get my own packages hosted on depot.genode.org,? If not, can you suggest where else I should publish them?

How should I go about writing depot recipes for various ports (e.g. qt5)?