refactor crawler - adapt to use new ENUM objects

app/crawler/crawl.js

@@ -5,8 +5,6 @@
    All environment specific configuration is read here and
    passed to the crawlers and savers.
 */
-
-require("dotenv").config();
 const OlxCrawler = require("./specific/olx");
 const { OLX_CONFIG } = require("./crawlerConfig");
 const PostgresSaver = require("./savers/postgres");