`make create-env`: Use `minikube image load`

[mbana]

Instead of building the image in the minikube docker environment, build it on the host. I.e., remove eval $$(minikube docker-env --profile kgw); docker build in favour of:

$ docker build ...
$ minikube image --profile kgw load kubeshop/kusk-gateway:$(git describe --tags $(git rev-list --tags --max-count=1))

This should result in faster builds if you delete the minikube cluster and re-create as the kubeshop/kusk-gateway:$(git describe --tags $(git rev-list --tags --max-count=1)) images are not being built in the minikube docker daemon so its layers are cached.

Results

I benchmarked the changes:

Old:

$ hyperfine --runs 3 'minikube delete --profile kgw && time make create-env'
Benchmark 1: minikube delete --profile kgw && time make create-env
  Time (mean ± σ):     97.866 s ±  2.965 s    [User: 32.466 s, System: 7.927 s]
  Range (min … max):   94.516 s … 100.156 s    3 runs

New:

$ hyperfine --runs 3 'minikube delete --profile kgw && time make create-env'
Benchmark 1: minikube delete --profile kgw && time make create-env
  Time (mean ± σ):     65.146 s ±  0.983 s    [User: 30.162 s, System: 6.345 s]
  Range (min … max):   64.340 s … 66.241 s    3 runs

Signed-off-by: Mohamed Bana mohamed@bana.io

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Could you please try out this branch to ensure it works in whatever setup you use.

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