[Vercel] Fix browser installation

[gohoski]

This is an issue to track the browser installation bugs found in the Vercel deployment.

When suno-api tries to spawn a browser on a Vercel deploy, an error occurs that is related to the difference between the runtime environment (to which suno-api has access) and the build environment (where Chromium gets installed).

error": "Error: pOST: Executable doesn't exist at /home/sbx_user1051/.cache/ms-playwright/chromium_headless_shell-1148/chrome-linux/headless_shell\n╔═════════════════════════════════════════════════════════════════════════╗\n║ Looks like Playwright Test or Playwright was just installed or updated. ║\n║ Please run the following command to download new browsers:              ║\n║                                                                         ║\n║     npx playwright install                                              ║\n║                                                                         ║\n║ <3 Playwright Team                                                      ║\n╚═════════════════════════════════════════════════════════════════════════╝"

@artokun said in #222 (comment) that he has a working Chromium Vercel deployment and I'm currently waiting for him to fix this.

Credits to @jonico for letting me know about this problem.

[artokun]

I'll try to get a proposal up tonight