fix: ignore unkown heroku certificates

https://nodejs.org/api/tls.html#tls_tls_createserver_options_secureconnectionlistener
https://node-postgres.com/features/ssl
brianc/node-postgres#2009
strapi/strapi#5696

Author: Schaeferjo

backend/config/env/production/database.js

@@ -10,6 +10,9 @@ module.exports = ({ env }) => ({
         database: env('DATABASE_NAME', 'strapi'),
         username: env('DATABASE_USERNAME', ''),
         password: env('DATABASE_PASSWORD', ''),
+        ssl: {
+          rejectUnauthorized: false, // For self-signed certificates
+        },
       },
       options: {
         ssl: true,