message: change archive-index cache default to be below DOCSRS_PREFIX
diff: @@ -98,7 +98,7 @@ impl Config {
  registry_index_path: env("REGISTRY_INDEX_PATH", prefix.join("crates.io-index"))?,
  registry_url: maybe_env("REGISTRY_URL")?,
  - prefix,
  + prefix: prefix.clone(),
  database_url: require_env("DOCSRS_DATABASE_URL")?,
  max_pool_size: env("DOCSRS_MAX_POOL_SIZE", 90)?,
  @@ -133,7 +133,7 @@ impl Config {
  local_archive_cache_path: env(
  "DOCSRS_ARCHIVE_INDEX_CACHE_PATH",
  - PathBuf::from(".archive_cache"),
  + prefix.join("archive_cache"),
  )?,
  rustwide_workspace: env("DOCSRS_RUSTWIDE_WORKSPACE", PathBuf::from(".workspace"))?,
  