update readme

README.md

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 ![Message](https://img.shields.io/badge/I%20%E2%9D%A4%20-OpenSource-%23ff0055)
 
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+JellyFish: A Dark theme For sublime text 4. Inspired from vscode-jellyfish.
 <br>
 
 <br>
 
 ![Preview](https://raw.githubusercontent.com/anubhavkrishna1/sublime-jellyfish/main/images/Preview1.png)
 
-<br>
+<br>
+
+### Installation
+
+###### Recommended
+
+You can install `ayu` via [Package Control](https://packagecontrol.io/).
+
+1. Press <kbd>cmd/ctrl</kbd> + <kbd>shift</kbd> + <kbd>p</kbd> to open the command palette.
+2. Type `install package` and press enter. Then search for `JellyFish Color Theme`
+
+###### Manual
+
+1. Download the [latest release](https://github.com/anubhavkrishna1/sublime-jellyfish/releases/latest), extract and rename the directory to `sublime-jellyfish`.
+2. Move the directory inside your sublime `Packages` directory. *(Preferences > Browse packages...)*
+
+---