Update simple game server example documentation

[vicentefb]

What type of PR is this?

Uncomment only one /kind <> line, press enter to put that in a new line, and remove leading whitespace from that line:

/kind breaking
/kind bug
/kind cleanup
/kind documentation
/kind feature
/kind hotfix
/kind release

What this PR does / Why we need it:
Updates Quickstart: Edit a Game Server documentation to reflect the usage of Makefile instead of docker build/push command, updates code snippet from main.go, updates kubectl command to retrieve IP Address and Port as well as create instead of apply command.

Which issue(s) this PR fixes:

Closes #

Special notes for your reviewer:

[vicentefb]

cc @zmerlynn

[agones-bot]

Build Succeeded 👏

Build Id: 34cf6a70-45f8-4ba9-ab14-d18de59c5e3f

The following development artifacts have been built, and will exist for the next 30 days:

• image: us-docker.pkg.dev/agones-images/ci/agones-controller:1.40.0-dev-9c99475-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.40.0-dev-9c99475-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.40.0-dev-9c99475-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.40.0-dev-9c99475-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.40.0-dev-9c99475-amd64
• Linux C++ SDK (build): agonessdk-1.40.0-dev-9c99475-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.40.0-dev-9c99475-amd64.zip

A preview of the website (the last 30 builds are retained):

• https://9c99475-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/3776/head:pr_3776 && git checkout pr_3776
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.40.0-dev-9c99475-amd64

[roberthbailey]

I think apply should work - why change to create?

[vicentefb]

I always ran into the following issue error: from simple-game-server-: cannot use generate name with apply and turns out that kubectl apply doesn't support generateName. Found some old random issues about it, tektoncd/pipeline#2170, kubernetes/kubernetes#44501 and argoproj/argo-cd#1639. The workaround is to use kubectl create -f.

[agones-bot]

Build Failed 😱

Build Id: 5cb3bdae-2198-49c6-9701-d46f3478baed

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[agones-bot]

Build Failed 😱

Build Id: 28de2771-e4e9-4f70-8c1b-3f40f97329c6

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[agones-bot]

Build Failed 😱

Build Id: 91f66bc7-9638-4502-afc1-3a0edaaed449

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[vicentefb]

/retest

[agones-bot]

Build Succeeded 👏

Build Id: ff485566-0733-4848-b6e4-b19be6d96517

The following development artifacts have been built, and will exist for the next 30 days:

• image: us-docker.pkg.dev/agones-images/ci/agones-controller:1.40.0-dev-7186017-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.40.0-dev-7186017-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.40.0-dev-7186017-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.40.0-dev-7186017-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.40.0-dev-7186017-amd64
• Linux C++ SDK (build): agonessdk-1.40.0-dev-7186017-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.40.0-dev-7186017-amd64.zip

A preview of the website (the last 30 builds are retained):

• https://7186017-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/3776/head:pr_3776 && git checkout pr_3776
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.40.0-dev-7186017-amd64