Binary cache online, distributed on B2 + Cloudflare

The solnix binary cache is live at cache.solnix.io. Add it as a substituter in your nix.conf together with its signing key and pull prebuilt, signed store paths instead of recompiling. Objects are stored in Backblaze B2 and served through Cloudflare, so egress stays affordable for a small project. A BitTorrent/WebRTC peer layer is planned on top of this; HTTP works today and remains the fallback. See the handbook binary-cache chapter for the exact configuration.