docs: update README.md

README.md

@@ -1 +1,36 @@
 # mitnal
+
+Twitter client for UEFI.
+
+## Screenshot
+
+![](Static/ScreenShot.png)
+
+## Requirements
+
+You need to enable "HTTP Protocol Stack Support" in your UEFI.
+
+## How to build
+
+Create a `MitnalPkg/Secrets` file as follows:
+
+```c
+static const CHAR8 *gConsumerKey = "<Your consumer key>";
+static const CHAR8 *gConsumerSecret = "<Your consume secret>";
+static const CHAR8 *gAccessToken = "<Your access token>";
+static const CHAR8 *gAccessTokenSecret = "<Your access token secret>";
+```
+
+Then,
+
+```bash
+$ make docker/build
+$ make run
+```
+
+## Usage
+
+Here is a list of available command:
+
+- `home`: show your timeline
+- `tweet hello`:  tweet 'hello'