Main License for git.alpinelinux.org content?

I can see from the APKBUILD files as to the source locations for package content, and I can trace (and confirm) the licensing of the third-party content for Alpine packages. (For example, https://git.alpinelinux.org/cgit/aports/tree/main/musl?h=3.7-stable pulls content from http://www.musl-libc.org/releases/musl-1.1.18.tar.gz ) However, I do not see a license statement for the content stored in git.alpinelinux.org. While there isn't much of it, there are patch files, occasional C files, and data files that become part of the distribution. Some of this has license headers in the files, but others do not. Is there a main license for Alpine that covers this content?

Thanks.