improvements: address feedback, feature docs and cert validation with dns rebinding handling

backend/src/lib/config/env.ts

@@ -59,6 +59,7 @@ const envSchema = z
     QUEUE_WORKERS_ENABLED: zodStrBool.default("true"),
     HTTPS_ENABLED: zodStrBool,
     ROTATION_DEVELOPMENT_MODE: zodStrBool.default("false").optional(),
+    DB_SSL_REJECT_UNAUTHORIZED: zodStrBool.default("true"),
     // smtp options
     SMTP_HOST: zpStr(z.string().optional()),
     SMTP_IGNORE_TLS: zodStrBool.default("false"),