Add git-based auto-update for Linux deployment

- install.sh now clones from git instead of copying files
- Service runs git pull on restart for automatic updates
- Support config.local.json for production settings (gitignored)
- kao.py prefers config.local.json when present

To update production: push changes, then 'sudo systemctl restart kao'

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -2,12 +2,17 @@
 
 A minimalist system status monitor that uses ASCII emotes to display server health on an old phone.
 
-![Status: Optimal](https://img.shields.io/badge/status-(%20%5E___%5E)-brightgreen)
+![Status: Optimal](<https://img.shields.io/badge/status-(%20%5E___%5E)-brightgreen>)
 
 ## Why?
 
 Turn an old phone (with its OLED screen) into a glanceable ambient display for your home server. Instead of graphs and numbers, see a happy face `( ^_^)` when things are good, and a worried face `( o_o)` when they're not.
 
+## TODO
+
+- Figure out way to update installation in /opt/kao when git updates. Maybe run a git pull on service startup?
+- Think about ways of implementing noises.
+
 ## Features
 
 - **OLED-optimized** — Pure black background, saves battery
@@ -34,24 +39,24 @@ Open http://localhost:5100 on your phone (use Fully Kiosk Browser for best resul
 
 ## Status Faces
 
-| State | Emote | Meaning |
-|-------|-------|---------|
-| Optimal | `( ^_^)` | All systems healthy |
-| Warning | `( o_o)` | Something needs attention |
-| Critical | `( x_x)` | Immediate action required |
-| Notify | `( 'o')` | Transient notification |
-| Sleeping | `( -_-)zzZ` | Sleep mode active |
-| Disconnected | `( ?.?)` | Can't reach server |
+| State        | Emote       | Meaning                   |
+| ------------ | ----------- | ------------------------- |
+| Optimal      | `( ^_^)`    | All systems healthy       |
+| Warning      | `( o_o)`    | Something needs attention |
+| Critical     | `( x_x)`    | Immediate action required |
+| Notify       | `( 'o')`    | Transient notification    |
+| Sleeping     | `( -_-)zzZ` | Sleep mode active         |
+| Disconnected | `( ?.?)`    | Can't reach server        |
 
 ## Built-in Detectors
 
-| Detector | Monitors |
-|----------|----------|
-| **disk_space** | Disk usage on all drives |
-| **cpu** | CPU utilization |
-| **memory** | RAM usage |
-| **service** | Whether processes are running |
-| **network** | Host reachability (ping) |
+| Detector       | Monitors                      |
+| -------------- | ----------------------------- |
+| **disk_space** | Disk usage on all drives      |
+| **cpu**        | CPU utilization               |
+| **memory**     | RAM usage                     |
+| **service**    | Whether processes are running |
+| **network**    | Host reachability (ping)      |
 
 ## Configuration
 
@@ -59,19 +64,19 @@ Edit `config.json` to enable/disable detectors and set thresholds:
 
 ```json
 {
-  "aggregator_url": "http://localhost:5100",
-  "detectors": [
-    {
-      "name": "disk_space",
-      "enabled": true,
-      "script": "detectors/disk_space.py",
-      "env": {
-        "CHECK_INTERVAL": "300",
-        "THRESHOLD_WARNING": "85",
-        "THRESHOLD_CRITICAL": "95"
-      }
-    }
-  ]
+	"aggregator_url": "http://localhost:5100",
+	"detectors": [
+		{
+			"name": "disk_space",
+			"enabled": true,
+			"script": "detectors/disk_space.py",
+			"env": {
+				"CHECK_INTERVAL": "300",
+				"THRESHOLD_WARNING": "85",
+				"THRESHOLD_CRITICAL": "95"
+			}
+		}
+	]
 }
 ```
 
@@ -91,6 +96,7 @@ curl -X POST http://localhost:5100/event \
 - `ttl` — Auto-expire after N seconds (for heartbeat pattern)
 
 Clear an event:
+
 ```bash
 curl -X POST http://localhost:5100/clear \
   -d '{"id": "my_check"}'
@@ -131,15 +137,15 @@ automation:
 
 ## API Reference
 
-| Endpoint | Method | Description |
-|----------|--------|-------------|
-| `/` | GET | Web UI |
-| `/status` | GET | Current state as JSON |
-| `/events` | GET | List all active events |
-| `/event` | POST | Register an event |
-| `/clear` | POST | Clear an event by ID |
-| `/sleep` | POST | Enter sleep mode |
-| `/wake` | POST | Exit sleep mode |
+| Endpoint  | Method | Description            |
+| --------- | ------ | ---------------------- |
+| `/`       | GET    | Web UI                 |
+| `/status` | GET    | Current state as JSON  |
+| `/events` | GET    | List all active events |
+| `/event`  | POST   | Register an event      |
+| `/clear`  | POST   | Clear an event by ID   |
+| `/sleep`  | POST   | Enter sleep mode       |
+| `/wake`   | POST   | Exit sleep mode        |
 
 ## Personality