Don't require host for postgres (twentyhq#8157) (#8159)

Not sure if this will pass the tests; I don't have TS experience so I'll
see what CI does with it.

Fixes #8157

packages/twenty-server/src/engine/core-modules/environment/environment-variables.ts

@@ -116,6 +116,7 @@ export class EnvironmentVariables {
     protocols: ['postgres'],
     require_tld: false,
     allow_underscores: true,
+    require_host: false,
   })
   PG_DATABASE_URL: string;