First release of the radicle recipe: a Radicle seed node (radicle-node +
radicle-httpd) with a self-hosted radicle-explorer frontend.

On first deploy the node generates its identity key and writes config.json into
the `radicle_home` volume, seeding all repositories by default (allow/all).

IMPORTANT: back up the `radicle_home` volume — it holds the node's identity key.
Losing it means losing this node's identity on the Radicle network. Open the
p2p port (default 8776) on the host firewall and set RAD_EXTERNAL_ADDRESS.
