Fix for Dockerfile build errors

[kamaljeeti]

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:

Which issue(s) this PR fixes:#3996

Closes #3996

Special notes for your reviewer:

[agones-bot]

Build Succeeded 🥳

Build Id: 5b256d92-2f7a-46bd-a867-93d0fdf6e314

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:1.44.0-dev-5adfaa0
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.44.0-dev-5adfaa0
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.44.0-dev-5adfaa0-linux
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.44.0-dev-5adfaa0
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.44.0-dev-5adfaa0
• Linux C++ SDK (build): agonessdk-1.44.0-dev-5adfaa0-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.44.0-dev-5adfaa0.zip

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

• https://5adfaa0-dot-preview-dot-agones-images.appspot.com/

To install this version:

git fetch https://github.com/googleforgames/agones.git pull/3997/head:pr_3997 && git checkout pr_3997
helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.44.0-dev-5adfaa0

[gongmax]

I cannot reproduce the original issue on #3996 with the latest code. No error thrown for docker build -t tag-name .. Can you double check whether it's reproducible?

[ashutosji]

Not needed as we are not able to reproduce anymore.