Support plaintext bun lockfile

Author: bai

actioncable/lib/rails/generators/channel/channel_generator.rb

@@ -105,7 +105,7 @@ def using_js_runtime?
         end
 
         def using_bun?
-          # Cannot assume bun.lockb has been generated yet so we look for a file known to
+          # Cannot assume Bun lockfile has been generated yet so we look for a file known to
           # be generated by the jsbundling-rails gem
           @using_bun ||= using_js_runtime? && root.join("bun.config.js").exist?
         end

railties/lib/rails/generators/rails/app/templates/Dockerfile.tt

@@ -66,7 +66,7 @@ RUN yarn install --frozen-lockfile
 <% end -%>
 <% if using_bun? -%>
 # Install node modules
-COPY package.json bun.lockb ./
+COPY package.json bun.lock* ./
 RUN bun install --frozen-lockfile
 
 <% end -%>