Add placeholder for docs for the generic driver

But most of it is identical to the "none" driver

pkg/drivers/generic/generic.go

@@ -38,6 +38,8 @@ import (
 	"k8s.io/minikube/pkg/minikube/sysinit"
 )
 
+// Driver is a driver designed to run kubeadm w/o VM management.
+// https://minikube.sigs.k8s.io/docs/reference/drivers/generic/
 type Driver struct {
 	*drivers.BaseDriver
 	*pkgdrivers.CommonDriver

site/content/en/docs/drivers/generic.md

+---
+title: "generic"
+weight: 3
+description: >
+  Linux generic (remote) driver
+aliases:
+    - /docs/reference/drivers/generic
+---
+
+## Overview
+
+This document is written for system integrators who wish to run minikube within a customized VM environment. The `generic` driver allows advanced minikube users to skip VM creation, allowing minikube to be run on a user-supplied VM.
+
+{{% readfile file="/docs/drivers/includes/generic_usage.inc" %}}
+
+## Issues
+
+* [Full list of open 'generic' driver issues](https://github.com/kubernetes/minikube/labels/co%2Fgeneric-driver)
+
+## Troubleshooting
+
+* Run `minikube start --alsologtostderr -v=4` to debug crashes

site/content/en/docs/drivers/includes/generic_usage.inc

+## Requirements
+
+A Linux VM with the following:
+
+* systemd or OpenRC
+* a container runtime, such as Docker or CRIO
+
+This VM must also meet the [kubeadm requirements](https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/), such as:
+
+* 2 CPU's
+* 2GB RAM
+* iptables (in legacy mode)
+* conntrack
+* crictl
+* SELinux permissive
+* cgroups v1 (v2 is not yet supported by Kubernetes)
+
+## Usage
+
+The generic driver requires the IP address of the VM to use.
+
+```shell
+minikube start --driver=generic --generic-ip-address=vm.example.com
+```
+