Consider recommending chromium-swiftshader to enable WebGL in the Dockerfile

[loraderon]

By switching from chromium to chromium-swiftshader it's possible to enable WebGL with a performance hit since it's software based.

remotion/packages/docs/docs/docker.md

Line 36 in bef427e

This Dockerfile is unable to render WebGL content. Suggestions on how to improve the Dockerfile to support it are welcomed.