Docker standalone not playing .m3u playlists

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Describe the bug
Docker installed on Synology DSM 7.2 successfully using the following compose file:
`**version: '3'

services:
backend:
image: 4gray/iptvnator-backend:latest
ports:
- "7333:3000"
environment:
- CLIENT_URL=http://mediavault:4333 #this one should match with the address and port in frontend CLIENT_URL env

frontend:
image: 4gray/iptvnator:latest
ports:
- "4333:80"
environment:
- BACKEND_URL=http://mediavault:7333 # this one should match with the address of the backend service**`

• Deploys successfully with no errors.
• I get "Hello World" when I try http://mediavault:7333 in a browser
• However when selecting a channel I just get the loading icon and nothing loads - instead it just times out.
• Not seeing any errors in the logs for either the front-end or back-end
• I also tried both the HTML5 and Video JS players
• Running latest docker version 0.14.0

To Reproduce
Steps to reproduce the behavior:

1. Launch IPTVnator by using the following address in my laptop browser: http://mediavault:4333/
2. Select "Add file via upload"
3. Upload .m3u channel list
4. NOTE: I cannot share the channel list as it is for a private site. However, I can confirm the list is valid and it works as I've tried it via VLC media player and the channels play without issue.

Expected behavior
Channels to play when selected

Screenshots
N/A

Desktop (please complete the following information):
Docker installed on Synology DSM 7.2
Tested in browser on MacBook pro m2 using Chrome and Firefox
(Mac OSX: 14.4.1 (23E224))
_iptvnator-frontend-1_logs.txt
_iptvnator-backend-1_logs.txt

Additional context
Add any other context about the problem here.

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Additional note. I tried this version: iptvnator.vercel.app and got the same error. See attached screenshot.