Refresh and add Apple Silicon (#338)

* Delete CKA stuff.
It's covered in CKA repo

* Rename nodes

* Cluster up again

* Update issue template

* Update README

* Begin rearranging docs

* Update links

* Initial mac instructions

* iterm2 image

* update ssh-copy-id to be cross platform

* remove vagrant specific

* Apple scripts WIP

* Add var for architecture

* order input files

* Apple build working!

* auto-locate docs

* install sshpass

* Set execute bit

* apple done!

* install sshpass

* edits

* Corrections

* kube version output

* Adjustments

* Adjustments

apple-silicon/scripts/02-setup-kernel.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+# Step 2 - Set up Operating System Prerequisites
+
+# Load required kernel modules
+sudo modprobe overlay
+sudo modprobe br_netfilter
+
+# Persist modules between restarts
+cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
+overlay
+br_netfilter
+EOF
+
+# Set required networking parameters
+cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
+net.bridge.bridge-nf-call-iptables  = 1
+net.bridge.bridge-nf-call-ip6tables = 1
+net.ipv4.ip_forward                 = 1
+EOF
+
+# Apply sysctl params without reboot
+sudo sysctl --system