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My Nginx reverse proxy configuration keeps returning a 502 bad gateway error for our Node backend, what are the most common misconfigurations I should check right now to fix this

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My Nginx reverse proxy configuration keeps returning a 502 bad gateway error for our Node backend, what are the most common misconfigurations I should check right now to fix this
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Nginx official documentation proxy_pass proxy_read_timeout error log upstream connection refused Node.js listen 0.0.0.0 troubleshootingGoogle ↗
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