A stuck Postgres lock took my whole site down. Here's the one-line cause and the fix.

My site started returning HTTP 500 on every request today. Not a slow page, not one broken route. The entire app was down.

Source: [Dev.to](https://dev.to/extensionsmarket/a-stuck-postgres-lock-took-my-whole-site-down-heres-the-one-line-cause-and-the-fix-59am)