Added memory limits and system info for memory

controller/README.md

@@ -36,6 +36,8 @@ Current version: **v0.2.1**
 - Manual rescan endpoint (`POST /api/stacks/rescan`)
 - Alphabetically sorted stack display (consistent card ordering)
 - Protected stacks (traefik, cloudflared, felhom-controller) can't be stopped
+- System info bar on dashboard: RAM, SSD, and HDD usage with progress bars
+- Docker Compose memory limits enforced via `deploy.resources.limits.memory`
 
 ### Known issues / next priorities
 - Cloudflare Tunnel + Traefik TLS: paperless.demo-felhom.eu works locally but shows "Not secure" (certificate chain not fully validated through tunnel)
@@ -88,6 +90,10 @@ controller/
 │   │   ├── metadata.go              # Parse .felhom.yml app metadata
 │   │   └── deploy.go                # First-deploy flow: secret gen, app.yaml, compose up
 │   ├── api/router.go                # REST API endpoints
+│   ├── system/
+│   │   ├── info.go                  # SystemInfo struct
+│   │   ├── info_linux.go            # Linux: /proc/meminfo + statfs
+│   │   └── info_other.go            # Non-Linux stub
 │   └── web/
 │       ├── server.go                # HTTP server, auth, page handlers, asset serving
 │       └── templates.go             # Embedded HTML templates + CSS (Hungarian UI)
@@ -110,6 +116,7 @@ controller/
 | **Config** | `internal/config/` | ✅ Done | Load & validate controller.yaml, env overrides |
 | **Stacks** | `internal/stacks/` | ✅ Done | Compose operations, scanning, metadata, deploy flow |
 | **API** | `internal/api/` | ✅ Done | REST endpoints (stacks, deploy, rescan, system info, health) |
+| **System** | `internal/system/` | ✅ Done | System resource info (RAM, disk usage) for dashboard & API |
 | **Web** | `internal/web/` | ✅ Done | Hungarian dashboard, auth, deploy pages, asset serving |
 | **Backup** | `internal/backup/` | 📲 Phase 3 | DB dumps, restic snapshots, restore |
 | **Monitor** | `internal/monitor/` | 📲 Phase 2 | Health checks, Healthchecks pings, system metrics |
@@ -277,7 +284,7 @@ docker compose up -d
 | POST | `/api/stacks/{name}/update` | Yes | Pull images + recreate |
 | GET | `/api/stacks/{name}/logs` | Yes | Container logs |
 | POST | `/api/stacks/rescan` | Yes | Trigger manual stack discovery |
-| GET | `/api/system/info` | Yes | Customer/domain info |
+| GET | `/api/system/info` | Yes | System resource usage (RAM, disk, HDD) |
 
 ## Status & Roadmap
 
@@ -305,9 +312,10 @@ docker compose up -d
 - [x] Deploy page doubles as read-only config viewer for deployed apps
 
 ### Phase 2 — Monitoring & Health
-- [ ] System metrics collection (CPU, RAM, disk, temperature)
+- [x] System metrics on dashboard (RAM, SSD, HDD usage bars)
+- [x] `/api/system/info` endpoint with live resource data
+- [ ] CPU and temperature metrics
 - [ ] Healthchecks.io ping integration
-- [ ] Dashboard system health panel
 - [ ] Customer notifications (email/Telegram)
 
 ### Phase 3 — Backups