Add README.md

Signed-off-by: Juhyung Park <[email protected]>

README.md

@@ -1 +1,35 @@
 # Nothing Phone 2 archive
+* Unmodified Nothing Phone 2 OTA images archive
+
+## Downloads
+Downloads are tagged with `POST_OTA_VERSION`, NothingOS version and region, [here](https://github.com/arter97/nothing_archive/releases).
+
+## Usage
+While this is a collection of unmodified images, you still need to have the bootloader unlocked.
+
+Please download and use the latest fastboot [directly from Google](https://developer.android.com/tools/releases/platform-tools).
+
+ * **Magisk**
+
+ If you're interested in just rooting your device, download `boot.img.zip` and `vbmeta.img.zip`. After extracting both zip files, push `boot.img` to your device and proceed with Magisk installation. Optionally, if you want to disable `dm-verity`, use fastboot to flash a modified vbmeta:
+
+ ``` bash
+ fastboot flash --disable-verity --disable-verification vbmeta vbmeta.img
+ ```
+
+ * **fastboot**
+
+To flash the stock, unmodified images with fastboot, extract the `*.zst` files using zstd and extract the split zip files using 7z, and supply the final `fastboot-*-image.zip` to fastboot.
+
+``` bash
+fastboot update /path/to/fastboot-*-image.zip
+```
+
+or if you want to have `dm-verity` disabled:
+
+``` bash
+fastboot update --disable-verity --disable-verification /path/to/fastboot-*-image.zip
+```
+
+### Thanks to
+[luk1337](https://github.com/luk1337/oplus_archive)