Add Proxmox-Vm template (#329)

Closes #212
/claim #212 

## Description

Adds a Proxmox VM template 

## Type of Change

- [ ] New module
- [x] New template
- [ ] Bug fix
- [ ] Feature/enhancement
- [ ] Documentation
- [ ] Other

## Testing & Validation

- [x] Code formatted (`bun run fmt`)
- [x] Changes tested locally


https://github.com/user-attachments/assets/d0fcdb6a-3451-4eaa-855d-912ac0cd4c45

---------

Co-authored-by: Atif Ali <[email protected]>

Author: m4rrypro

.icons/proxmox.svg

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+---
+display_name: "Muhammad Uamir Ali"
+bio: "Cloud Engineer | Infrastructure as code, Kubernetes | SRE"
+github: "m4rrypro"
+avatar: "./.images/avatar.jpeg"
+linkedin: "https://www.linkedin.com/in/m4rry"
+support_email: "[email protected]"
+status: "community"
+---
+
+# Muhammad Umair Ali
+
+Cloud Engineer | Infrastructure as code, Kubernetes | SRE

registry/umair/.images/avatar.jpeg

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+---
+display_name: Proxmox VM
+description: Provision VMs on Proxmox VE as Coder workspaces
+icon: ../../../../.icons/proxmox.svg
+verified: false
+tags: [proxmox, vm, cloud-init, qemu]
+---
+
+# Proxmox VM Template for Coder
+
+Provision Linux VMs on Proxmox as [Coder workspaces](https://coder.com/docs/workspaces). The template clones a cloud‑init base image, injects user‑data via Snippets, and runs the Coder agent under the workspace owner's Linux user.
+
+## Prerequisites
+
+- Proxmox VE 8/9
+- Proxmox API token with access to nodes and storages
+- SSH access from Coder provisioner to Proxmox VE
+- Storage with "Snippets" content enabled
+- Ubuntu cloud‑init image/template on Proxmox
+  - Latest images: https://cloud-images.ubuntu.com/ ([source](https://cloud-images.ubuntu.com/))
+
+## Prepare a Proxmox Cloud‑Init Template (once)
+
+Run on the Proxmox node. This uses a RELEASE variable so you always pull a current image.
+
+```bash
+# Choose a release (e.g., jammy or noble)
+RELEASE=jammy
+IMG_URL="https://cloud-images.ubuntu.com/${RELEASE}/current/${RELEASE}-server-cloudimg-amd64.img"
+IMG_PATH="/var/lib/vz/template/iso/${RELEASE}-server-cloudimg-amd64.img"
+
+# Download cloud image
+wget "$IMG_URL" -O "$IMG_PATH"
+
+# Create base VM (example ID 999), enable QGA, correct boot order
+NAME="ubuntu-${RELEASE}-cloudinit"
+qm create 999 --name "$NAME" --memory 4096 --cores 2 \
+  --net0 virtio,bridge=vmbr0 --agent enabled=1
+qm set 999 --scsihw virtio-scsi-pci
+qm importdisk 999 "$IMG_PATH" local-lvm
+qm set 999 --scsi0 local-lvm:vm-999-disk-0
+qm set 999 --ide2 local-lvm:cloudinit
+qm set 999 --serial0 socket --vga serial0
+qm set 999 --boot 'order=scsi0;ide2;net0'
+
+# Enable Snippets on storage 'local' (one‑time)
+pvesm set local --content snippets,vztmpl,backup,iso
+
+# Convert to template
+qm template 999
+```
+
+Verify:
+
+```bash
+qm config 999 | grep -E 'template:|agent:|boot:|ide2:|scsi0:'
+```
+
+### Enable Snippets via GUI
+
+- Datacenter → Storage → select `local` → Edit → Content → check "Snippets" → OK
+- Ensure `/var/lib/vz/snippets/` exists on the node for snippet files
+- Template page → Cloud‑Init → Snippet Storage: `local` → File: your yml → Apply
+
+## Configure this template
+
+Edit `terraform.tfvars` with your environment:
+
+```hcl
+# Proxmox API
+proxmox_api_url          = "https://<PVE_HOST>:8006/api2/json"
+proxmox_api_token_id     = "<USER@REALM>!<TOKEN>"
+proxmox_api_token_secret = "<SECRET>"
+
+# SSH to the node (for snippet upload)
+proxmox_host     = "<PVE_HOST>"
+proxmox_password = "<NODE_ROOT_OR_SUDO_PASSWORD>"
+proxmox_ssh_user = "root"
+
+# Infra defaults
+proxmox_node        = "pve"
+disk_storage        = "local-lvm"
+snippet_storage     = "local"
+bridge              = "vmbr0"
+vlan                = 0
+clone_template_vmid = 999
+```
+
+### Variables (terraform.tfvars)
+
+- These values are standard Terraform variables that the template reads at apply time.
+- Place secrets (e.g., `proxmox_api_token_secret`, `proxmox_password`) in `terraform.tfvars` or inject with environment variables using `TF_VAR_*` (e.g., `TF_VAR_proxmox_api_token_secret`).
+- You can also override with `-var`/`-var-file` if you run Terraform directly. With Coder, the repo's `terraform.tfvars` is bundled when pushing the template.
+
+Variables expected:
+
+- `proxmox_api_url`, `proxmox_api_token_id`, `proxmox_api_token_secret` (sensitive)
+- `proxmox_host`, `proxmox_password` (sensitive), `proxmox_ssh_user`
+- `proxmox_node`, `disk_storage`, `snippet_storage`, `bridge`, `vlan`, `clone_template_vmid`
+- Coder parameters: `cpu_cores`, `memory_mb`, `disk_size_gb`
+
+## Proxmox API Token (GUI/CLI)
+
+Docs: https://pve.proxmox.com/wiki/User_Management#pveum_tokens
+
+GUI:
+
+1. (Optional) Create automation user: Datacenter → Permissions → Users → Add (e.g., `terraform@pve`)
+2. Permissions: Datacenter → Permissions → Add → User Permission
+   - Path: `/` (or narrower covering your nodes/storages)
+   - Role: `PVEVMAdmin` + `PVEStorageAdmin` (or `PVEAdmin` for simplicity)
+3. Token: Datacenter → Permissions → API Tokens → Add → copy Token ID and Secret
+4. Test:
+
+```bash
+curl -k -H "Authorization: PVEAPIToken=<USER@REALM>!<TOKEN>=<SECRET>" \
+  https:// < PVE_HOST > :8006/api2/json/version
+```
+
+CLI:
+
+```bash
+pveum user add terraform@pve --comment 'Terraform automation user'
+pveum aclmod / -user terraform@pve -role PVEAdmin
+pveum user token add terraform@pve terraform --privsep 0
+```
+
+## Use
+
+```bash
+# From this directory
+coder templates push --yes proxmox-cloudinit --directory . | cat
+```
+
+Create a workspace from the template in the Coder UI. First boot usually takes 60–120s while cloud‑init runs.
+
+## How it works
+
+- Uploads rendered cloud‑init user‑data to `<storage>:snippets/<vm>.yml` via the provider's `proxmox_virtual_environment_file`
+- VM config: `virtio-scsi-pci`, boot order `scsi0, ide2, net0`, QGA enabled
+- Linux user equals Coder workspace owner (sanitized). To avoid collisions, reserved names (`admin`, `root`, etc.) get a suffix (e.g., `admin1`). User is created with `primary_group: adm`, `groups: [sudo]`, `no_user_group: true`
+- systemd service runs as that user:
+  - `coder-agent.service`
+
+## Troubleshooting quick hits
+
+- iPXE boot loop: ensure template has bootable root disk and boot order `scsi0,ide2,net0`
+- QGA not responding: install/enable QGA in template; allow 60–120s on first boot
+- Snippet upload errors: storage must include `Snippets`; token needs Datastore permissions; path format `<storage>:snippets/<file>` handled by provider
+- Permissions errors: ensure the token's role covers the target node(s) and storages
+- Verify snippet/QGA: `qm config <vmid> | egrep 'cicustom|ide2|ciuser'`
+
+## References
+
+- Ubuntu Cloud Images (latest): https://cloud-images.ubuntu.com/ ([source](https://cloud-images.ubuntu.com/))
+- Proxmox qm(1) manual: https://pve.proxmox.com/pve-docs/qm.1.html
+- Proxmox Cloud‑Init Support: https://pve.proxmox.com/wiki/Cloud-Init_Support
+- Terraform Proxmox provider (bpg): `bpg/proxmox` on the Terraform Registry
+- Coder – Best practices & templates:
+  - https://coder.com/docs/tutorials/best-practices/speed-up-templates
+  - https://coder.com/docs/tutorials/template-from-scratch