Refactoring code and structure

Dockerfile

@@ -9,8 +9,8 @@ RUN apt-get install psmisc
 RUN npm install
 COPY . .
 RUN npm run build
-RUN chmod +x ./lib/fetch-yt-dlp.sh
-RUN ./lib/fetch-yt-dlp.sh && mv yt-dlp ./lib
+RUN chmod +x ./server/fetch-yt-dlp.sh
+RUN ./server/fetch-yt-dlp.sh && mv yt-dlp ./server
 RUN rm -rf .parcel-cache
 EXPOSE 3022
 CMD [ "node" , "./server.js" ]