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ubuntu - EC2 - rails - Docker - NGINX Unable to proxy_pass redirect to localhost:3000 - Server Fault
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ruby on rails - I connected my web with port 80 and it is connected, but the web shows 'Unable to connect' - Stack Overflow
Cannot connect to a rails development server on custom port in Puma 3.7.0 · Issue #1207 · puma/puma · GitHub
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Address already in use – bind(2) for “127.0.0.1” port 3000 (Errno::EADDRINUSE) | Check what process is running in your localhost – C B
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