Update README.md

README.md

@@ -199,7 +199,7 @@ basic `codemetrics-rules--class-declaration`.
 - [resharper-cognitivecomplexity](https://github.com/matkoch/resharper-cognitivecomplexity)
 - [gocognit](https://github.com/uudashr/gocognit)
 
-## Contribute
+## 🛠️ Contribute
 
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](http://makeapullrequest.com)
 [![Elisp styleguide](https://img.shields.io/badge/elisp-style%20guide-purple)](https://github.com/bbatsov/emacs-lisp-style-guide)
@@ -243,3 +243,62 @@ To look for the correct node you have three options:
 > Make sure you look into the correct repository. Repositories are managed
 > under [tree-sitter-langs](https://github.com/emacs-tree-sitter/tree-sitter-langs)'s
 > using git submodule. Some tree-sitter module aren't using the latest version!
+
+### 🔬 Development
+
+To run the test locally, you will need the following tools:
+
+- [Eask](https://emacs-eask.github.io/)
+- [Make](https://www.gnu.org/software/make/) (optional)
+
+Install all dependencies and development dependencies:
+
+```sh
+$ eask install-deps --dev
+```
+
+To test package's installation:
+
+```sh
+$ eask package
+$ eask install
+```
+
+To test compilation:
+
+```sh
+$ eask compile
+```
+
+**🪧 The following steps are optional, but we recommend you follow these lint results!**
+
+The built-in `checkdoc` linter:
+
+```sh
+$ eask lint checkdoc
+```
+
+The standard `package` linter:
+
+```sh
+$ eask lint package
+```
+
+*📝 P.S. For more information, find the Eask manual at https://emacs-eask.github.io/.*
+
+## ⚜️ License
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+See [`LICENSE`](./LICENSE.txt) for details.