Joe Groocock 32734c3aa0 Build Plex on musl, from scratch ...

Plex now provide a first-party musl Plex build that works without any
external dependencies whatsoever. It's built with LLVM with many
compiler and linker optimisations enabled:
https://forums.plex.tv/t/plex-media-server-forum-preview-faster-and-smaller-builds-with-new-toolchain/699575

Changes for this release include:
- Drop curl, OpenSSL and zlib; they're no longer required. libcurl and
  libssl/libcrypto are provided by Plex anyway.
- Build `FROM spritsail/alpine` instead of `FROM debian` to ensure musl
  compatibility with all compiled binaries. Use `FROM scratch` for the
  resulting image. ld-musl is provided by Plex.
- Build busybox, su-exec and tini as they're no longer provided by the
  base image.
- Build binaries/libraries with standard hardening flags, including the
  popular -flto.

Signed-off-by: Joe Groocock <me@frebib.net>

2021-03-13 17:29:51 +00:00

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