[Docs]: Directory - Add troubleshooting note that Mac machines with Airplay Receiver may conflict with the directory startup

[shmcfarl]

Issue Description

If a Mac user has the AirPlay receiver enabled, it may collide with port 5000 when the user enters "task server:start" as found in the getting started guide:
https://docs.agntcy.org/dir/getting-started/

Colliding Mac AirPlay Service:
Port 5000 is in use by PID 714 (ControlCe).

Error:
task server:start
task: [server:store:pull] docker pull ghcr.io/project-zot/zot-linux-arm64:v2.1.10

v2.1.10: Pulling from project-zot/zot-linux-arm64
44d654bc6e99: Pull complete
bfb59b82a9b6: Pull complete
017886f7e176: Pull complete
62de241dac5f: Pull complete
2780920e5dbf: Pull complete
7c12895b777b: Pull complete
3214acf345c0: Pull complete
5664b15f108b: Pull complete
045fc1c20da8: Pull complete
4aa0ea1413d3: Pull complete
da7816fa955e: Pull complete
ddf74a63f7d8: Pull complete
253e490c8ad8: Pull complete
06730eaeb281: Pull complete
04c23590f9a5: Pull complete
84f0ec4a2d1b: Pull complete
225a015aeda5: Pull complete
Digest: sha256:df36d6180c05bf16cefaa1358dea523e2a87e4389cc59327f2dfc698d8abc7a7
Status: Downloaded newer image for ghcr.io/project-zot/zot-linux-arm64:v2.1.10
ghcr.io/project-zot/zot-linux-arm64:v2.1.10

What's next:
View a summary of image vulnerabilities and recommendations → docker scout quickview ghcr.io/project-zot/zot-linux-arm64:v2.1.10
task: [server:store:start] # mount config
cat > /tmp/config.json <<EOF
{
"distSpecVersion": "1.1.1",
"storage": {
"rootDirectory": "/tmp/zot"
},
"http": {
"address": "0.0.0.0",
"port": "5000"
},
"log": {
"level": "debug"
},
"extensions": {
"search": {
"enable": true
},
"trust": {
"enable": true,
"cosign": true,
"notation": false
}
}
}
EOF

run docker with attached volume

docker run
-it
--rm -d -p 5000:5000
-v /tmp/config.json:/config.json:ro
--name oci-registry ghcr.io/project-zot/zot-linux-arm64:v2.1.10 serve /config.json

f2288d13d3ba890a00ea2c305c20ee9a4b8f407c327d7fab635dda26fc6cba11
docker: Error response from daemon: ports are not available: exposing port TCP 0.0.0.0:5000 -> 127.0.0.1:0: listen tcp 0.0.0.0:5000: bind: address already in use

Run 'docker run --help' for more information
task: [server:store:stop] docker stop oci-registry
Error response from daemon: No such container: oci-registry
task: Failed to run task "server:start": exit status 125

Prposed Solution

A troubleshooting note should be created in the directory getting started guide to help a user disable the AirPlay Receiver as show in the screenshot.

Affected Component

Directory

Checklist

• I have read the contributing guidelines.
• I have verified this does not duplicate an existing issue.