add system requirements (#892)

README.md

@@ -29,14 +29,33 @@ Before we get started everything below must be taken into consideration, you mus
 - [ ] bring a **positive attitude** and be ready to learn and fail a lot. _The more you fail, the more you can learn from._
 - [ ] run the cluster on bare metal machines or VMs within your home network — **this is NOT designed for cloud environments**.
 - [ ] have Debian 12 freshly installed on 1 or more AMD64/ARM64 bare metal machines or VMs. Each machine will be either a **control node** or a **worker node** in your cluster.
-- [ ] give your nodes unrestricted internet access — _air-gapped environments won't work_.
+- [ ] give your nodes unrestricted internet access — **air-gapped environments won't work**.
 - [ ] have a domain you can manage on Cloudflare.
 - [ ] be willing to commit encrypted secrets to a public GitHub repository.
 - [ ] have a DNS server that supports split DNS (e.g. Pi-Hole) deployed somewhere outside your cluster **ON** your home network.
 
-## 💻 System Preparation
+## 💻 Machine Preparation
 
-This projects supported Linux distro for running Kubernetes is Debian, Ubuntu _might_ work but it is not currently supported due to [these](https://github.com/onedr0p/flux-cluster-template/pull/830) reasons.
+### System requirements
+
+📍 _k3s default behaviour is that all nodes are able to run workloads, including contol nodes. Worker nodes are therefore optional._
+
+📍 _If you have 3 or more nodes it is strongly recommended to make 3 of them control nodes for a highly available control plane._
+
+📍 _Ideally you will run the cluster on bare metal machines. If you intend to run your cluster on Proxmox VE, my thoughts and recommendations about that are documented [here](https://onedr0p.github.io/home-ops/notes/proxmox-considerations.html)._
+
+#### Minimum
+
+| Role      | Memory    | Cores   | Disk        |
+|-----------|-----------|---------|-------------|
+| Control   | 8GB       | 4       | 100GB SSD   |
+| Worker    | 4GB       | 2       | 100GB SSD   |
+
+#### Recommended
+
+| Role      | Memory    | Cores   | System Disk  | Data Disk     | CPU      |
+|-----------|-----------|---------|--------------|---------------|----------|
+| Any       | 32GB      | 8       | 100GB SSD    | 1TB NVMe      | AMD64    |
 
 #### Debian for AMD64