Alpine Example Slight Adjustment

[coderforlife]

Support guidelines

• [X] I've read the support guidelines

I've found a bug and checked that ...

• [X] ... the documentation does not mention anything about my problem
• [X] ... there are no open or closed issues that are related to my problem

Description

The fts apk should be added in the Alpine example, it is needed by some of the osxcross binaries (at least *-ar, possibly others; the *-ar binary is required for cross-compiling with meson). It is also a very small install (28 kb install size).

Expected behaviour

The alpine dockerfile example to be able to run the *-ar binaries.

Actual behaviour

Error message when running those binaries, for example:

Error loading shared library libfts.so.0: No such file or directory (needed by /osxcross/bin/x86_64-apple-darwin22.2-ar)

Steps to reproduce

Run x86_64-apple-darwin22.2-ar in the alpine docker container example (instead of o64-...).

Docker info

Client:
 Context:    default
 Debug Mode: false

Server:
 Containers: 3
  Running: 1
  Paused: 0
  Stopped: 2
 Images: 44
 Server Version: 20.10.21
 Storage Driver: btrfs
  Build Version: Btrfs v6.0.2
  Library Version: 102
 Logging Driver: journald
 Cgroup Driver: systemd
 Cgroup Version: 2
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runtime.v1.linux runc io.containerd.runc.v2
 Default Runtime: runc
 Init Binary: /usr/libexec/docker/docker-init
 containerd version: 
 runc version: 
 init version: 
 Security Options:
  seccomp
   Profile: default
  selinux
  cgroupns
 Kernel Version: 6.2.15-100.fc36.x86_64
 Operating System: Fedora Linux 36 (Cinnamon)
 OSType: linux
 Architecture: x86_64
 CPUs: 16
 Total Memory: 250.5GiB
 Name: hippocampus.cslab.moravian.edu
 ID: RSQ4:NTHI:7ZCF:S37J:37GJ:EXGI:I5J5:GGY3:TZ6I:2IE7:OLDM:4NB7
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: true

Version

• MacOSX SDK version: latest
• System info (type uname -a): really?

Container logs

Simple suggestion doesn't need all of this.

Additional info

No response

[crazy-max]

Sounds good, feel free to open a PR, thanks!