* update libvpx & libwebp to latest releases
libvpx: 1.13.1
libwebp: 1.3.2
* Dockerfile: update libwebp libraries
libwebpmux is required for libwebp_anim_encoder. libsharpyuv is required
by libwebp since 1.3.0.
Updated the README file to include detailed instructions on how to use our project. This information will help new users get started quickly and understand the project's purpose.