Clean up the purestorage config, and add explanatory comments.

We're keeping beta on local disk for now.

config/environments/beta.rb

@@ -3,6 +3,6 @@ require_relative "production"
 Rails.application.configure do
   config.action_mailer.default_url_options = { host: "%{tenant}.37signals.works" }
 
-  # I couldn't figure out how to configure Pure to allow updates from Kevin's digital ocean instance.
+  # Let's keep beta on local disk. See https://github.com/basecamp/fizzy/pull/557 for context.
   config.active_storage.service = :local
 end

config/storage.yml

@@ -6,10 +6,11 @@ local:
   service: Disk
   root: <%= Rails.root.join("storage", "tenants", Rails.env, "%{tenant}", "files") %>
 
-<% purestorage_env_name = Rails.env.beta? ? "staging" : Rails.env %>
+# We have "development", "staging", and "production" buckets configured. Note that we don't have a
+# "beta" bucket. (As of 2025-06-01.)
 purestorage:
   service: S3
-  bucket: fizzy-<%= purestorage_env_name %>-activestorage
+  bucket: fizzy-<%= Rails.env %>-activestorage
   endpoint: "https://storage.basecamp.com"
   ssl_verify_peer: false # FIXME: using self-signed cert internally
   force_path_style: true