updated dockerfile

Dockerfile

@@ -9,13 +9,10 @@ RUN apk add curl wget psmisc python3 ffmpeg
 COPY . .
 RUN chmod +x ./fetch-yt-dlp.sh
 # install node dependencies
-RUN npm install
-RUN npm run build
-RUN npm run build-server
-RUN npm run fetch
-# cleanup
-RUN npm remove parcel
-RUN rm -rf .parcel-cache
+RUN yarn
+RUN yarn build
+RUN yarn build-server
+RUN yarn run fetch
 # expose and run
 EXPOSE 3022
 CMD [ "node" , "./dist/main.js" ]