This uses scala3, kubernetes, colima, postgresql, cats, doobie, and http4s to create a simple web service that does not do a ton.

Install colima and run it with kubernetes and containerd. Make sure you don't have Docker desktop running. If you do, turn it off. If you want to do this docker desktop you are on your own. The reason I recommend against Docker desktop is because

• It is slow and resource intensive on a Mac
• Licensing can be awkward

To start colima on MacOS do something like the below

colima start --cpu 2 --memory 2 --kubernetes --vm-type=vz --runtime=containerd

This says to start a vm with 2 cpus and 2 GB of memory using a containerd runtime with kubernetes support using the vm machine vz.

Nerdctl is a docker compatible cli, but it works with containerd. To install, run

colima nerdctl install

Kubectl is a cli for talking with kubernetes. Please follow these instructions for your given OS to install them.

Colima requires that ANY images that you want kubernetes to see you must use the nerdctl namespace k8s.io for it.

nerdctl build -f docker/Dockerfile -t web-app:latest --progress plain --namespace k8s.io .

Kustomize is a tool for overlays for creating kubernetes infrastructure. It is built into kubectl.

kubectl create namespace web-app-dev
kubectl apply -k kube/overlays/local