deploy/README: add resource requirements section (512MB RAM, 1 vCPU, 2GB disk)

deploy/README.md

@@ -16,6 +16,14 @@ That's it. The script handles everything: system update → Docker → Docker Co
 
 **Requires:** Debian/Ubuntu, root access, port 80 available.
 
+**Resource requirements:**
+- **RAM:** 512 MB minimum, 1 GB recommended
+- **CPU:** 1 vCPU
+- **Disk:** 2 GB
+- **Ports:** 80 (HTTP)
+
+These are trivial requirements — runs comfortably on a 512 MB LXC or minimal VM.
+
 **What it does:**
 1. Updates system packages
 2. Installs Docker (if not present)