gitea update

docs/gitea-binary-cache.md

@@ -8,6 +8,9 @@ The workflows in `.gitea/workflows/` publish the closures of every
 - `nix-cache-update.yml` runs on every branch push. It creates one immutable
   generation release per commit and uploads only NAR content hashes that have
   not appeared in an older generation.
+- Hosts are built independently. If one host fails, successful host closures
+  and store paths completed during the failed build are published before the
+  job reports the build failure.
 - The `cache-latest` release is the stable cache index. It contains
   `nix-cache-info`, `cache-public-key`, `cache-manifest.json`, and every
   `<store-hash>.narinfo` file.
@@ -45,6 +48,9 @@ Nix clients to use this as an unauthenticated substituter. The runner needs
 enough disk for the Nix store plus one compressed copy of all host closures.
 It also needs `bash`, `curl`, `jq`, and standard GNU userland tools.
 
+The workflows remove `/homeless-shelter` before building. Nix requires that
+dummy home path not to exist when the runner performs builds without a sandbox.
+
 ## NixOS client configuration
 
 After bootstrap, copy the exact value from `cache-public-key` into