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Body Context: My deployment got stuck after adding `puma` to the Build Command in Render settings. The `puma` command starts a long-running server process, but the Build Command expects tasks that finish (like `bundle install`, `assets:precompile`). Resolution: I removed `puma` from the Build Command and placed it in the dedicated Start Command field in Render's Web Service settings (e.g., `bundle exec puma -C config/puma.rb`). Learning: I learned to distinguish between Build Commands (setup tasks that complete, e.g., installing dependencies, compiling assets) and Start Commands (long-running server processes) in deployment platform configurations like Render.

Learned on (YYYY-MM-DD)

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