fix docker build, add proper mocks to tests, remove YouTubeAPI dependency on youtube test mock, move index.ts and test.ts to /src ant /test folders

src/index.ts

@@ -0,0 +1,9 @@
+import {config} from "./config";
+import {initDb} from './databases/databases';
+import {createServer} from "./app";
+import {Logger} from "./utils/logger";
+
+initDb();
+createServer(() => {
+  Logger.info("Server started on port " + config.port + ".");
+});