simplify woodpecker pipeline, add ctrl/standalone gateway

ctrl/standalone/README.md

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+# sysmonstm standalone deployment
+
+Minimal standalone gateway for AWS deployment without Redis/TimescaleDB dependencies.
+
+## Status
+- [x] Created standalone main.py with FastAPI + WebSocket
+- [x] Created Dockerfile
+- [x] Created docker-compose.yml (uses gateway network)
+- [ ] Deploy to AWS
+- [ ] Update nginx config (sysmonstm.mcrn.ar -> sysmonstm:8080)
+- [ ] Create local collector script to push metrics
+
+## Deploy
+
+```bash
+# On AWS
+cd ~/sysmonstm
+docker compose up -d --build
+
+# Add to gateway network
+docker network connect gateway sysmonstm
+```
+
+## Architecture
+
+- Gateway shows "no collectors connected" until a collector pushes metrics via WebSocket
+- Collectors can be run anywhere and connect to wss://sysmonstm.mcrn.ar/ws
+- No Redis/TimescaleDB needed - metrics stored in memory only
+
+## TODO
+- Create simple collector script for local machine
+- Add basic auth for collector connections