Update Dockerfile with extra ENV variables

Fix Dockerfile: remove invalid 'serve' command and use minimal config

Update Dockerfile to use port 7860

Fix Dockerfile: use browserless/chrome instead of browserless/browserless

Replace Obscura with browserless

Enable stealth mode

Run Obscura directly on port 7860, remove Python proxy layer

Add transparent TCP proxy with health check for HF Spaces

Set up Obscura headless browser on port 7860 for HF Spaces