Update docs: add settings.md

Signed-off-by: YoungSoo Shin <shinys000114@gmail.com>

docs/settings.md

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+# Settings
+
+> **Warning**
+> Wi-Fi and IP related settings will restart the Wi-Fi service.
+> After applying the settings, you may need to reconnect to the page.
+>
+> Please be careful when applying settings. Incorrect settings may prevent you from connecting to the device.
+> If you have problems with the device settings, connect the debug USB-C connector to check the device's logs.
+> If necessary, you can re-update the firmware to initialize the device.
+
+## Connect to Wi-Fi
+
+The device boots in APSTA mode by default and services the following AP.
+
+- SSID: odroid-pm
+- Password: powermate
+
+After connecting to the above AP using a smartphone, etc., you can configure the device by accessing the
+`http://192.168.4.1` address.
+
+> **Warning**
+> A warning that the AP does not have internet may appear. Please press `Allow connection` to connect to the device.
+
+You can open the settings window by pressing the gear button at the top.
+Press the Scan button to see a list of nearby APs.
+
+<img src="img/1000030234.jpg" width="300">
+
+After entering the password, press the Connect button and PowerMate will attempt to connect to the AP.
+For public APs, leave the Password blank.
+
+<img src="img/1000030235.jpg" width="300">
+
+
+
+<img src="img/1000030236.jpg" width="300">
+
+When Wi-Fi is connected, the green SSID name appears at the top of the page.
+
+<img src="img/1000030237.jpg" width="300">
+
+## Set static ip
+
+You can assign the IP of the device yourself.
+You can set the IP directly by turning on the `Use Static IP` toggle in the `Network` tab.
+
+![static.png](img/static.png)
+
+## AP Mode
+
+Configure the AP function of PowerMate.
+
+If you do not need the AP service, it is recommended to disable it.
+
+![apmode.png](img/apmode.png)
+
+## Current Limit
+
+Monitors the current of PowerMate, and if a value higher than the set current is detected, all load switches are turned
+off.
+
+![current.png](img/current.png)
+
+## Device
+
+Sets the UART Baudrate. Please match it with the baudrate of the connected ODROID.
+
+| ODROID           | Baud rate                  |
+|------------------|----------------------------|
+| ODROID-C4        | 115200                     |
+| ODROID-C5        | 921600                     |
+| ODROID-M1/M1S/M2 | 1500000                    |
+| ODROID-H3/4      | According to user settings |
+
+You can reboot the PowerMate. The state of the load switch does not change due to rebooting.
+
+![device.png](img/device.png)