Update Alpine image to fix security vulnerability and minor indentation fixes

[tunguyen9889]

Hi @nicolaka,

Please help review the PR:

• The current Docker image contains some CRITICAL and HIGH vulnerabilities, update the alpine image to 3.18.5.
• calicoctl has been moved to new repository: https://github.com/projectcalico/calico
• Minor fixes for some indentations.

Also you might need to setup a schedule for the GitHub workflow, so it can build and patch the Docker image.

You can run this command to scan the vulnerabilities of current image:

docker run --platform linux/amd64 --rm -v /var/run/docker.sock:/var/run/docker.sock aquasec/trivy:latest image --format table --ignore-unfixed --no-progress --exit-code 0 --ignore-unfixed --severity CRITICAL,HIGH --offline-scan --timeout 15m nicolaka/netshoot:v0.11

Thanks