docs: Add contribute section

Author: jcs090218

README.org

@@ -22,3 +22,73 @@ It adds two functions ~ace-link-dashboard~ to trigger default action and
                 ("o" . ace-link-dashboard)
                 ("d" . ace-link-dashboard-remove)))
 #+end_src
+
+** 🛠️ Contribute
+
+[[http://makeapullrequest.com][https://img.shields.io/badge/PRs-welcome-brightgreen.svg]]
+[[https://github.com/bbatsov/emacs-lisp-style-guide][https://img.shields.io/badge/elisp-style%20guide-purple.svg]]
+
+If you would like to contribute to this project, you may either
+clone and make pull requests to this repository. Or you can
+clone the project and establish your own branch of this tool.
+Any methods are welcome!
+
+*** 🔬 Development
+
+To run the test locally, you will need the following tools:
+
+- [[https://emacs-eask.github.io/][Eask]]
+- [[https://www.gnu.org/software/make/][Make]] (optional)
+
+Install all dependencies and development dependencies:
+
+#+begin_src sh
+$ eask install-deps --dev
+#+end_src
+
+To test the package's installation:
+
+#+begin_src sh
+$ eask package
+$ eask install
+#+end_src
+
+To test compilation:
+
+#+begin_src sh
+$ eask compile
+#+end_src
+
+🪧 The following steps are optional, but we recommend you follow these lint results!
+
+The built-in =checkdoc= linter:
+
+#+begin_src sh
+$ eask lint checkdoc
+#+end_src
+
+The standard =package= linter:
+
+#+begin_src sh
+$ eask lint package
+#+end_src
+
+📝 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]] for details.
+