Add MIT License

LICENSE.txt

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 Isaiah Odhner
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -33,6 +33,7 @@ I want to bring good old Paint into the modern era.
 
 #### Current improvements include:
 
+* Open source ([MIT licensed](LICENSE.txt))
 * Cross-platform
 * Mobile friendly
   * Touch support: use two fingers to pan the view, and pinch to zoom
@@ -311,3 +312,12 @@ You can build for production with `npm run electron:make`
 [Live Server]: https://github.com/1j01/live-server
 [Node.js]: https://nodejs.org/
 [electron-debug]: https://github.com/sindresorhus/electron-debug
+
+## License
+
+JS Paint is free and open source software, licensed under the permissive [MIT license](https://opensource.org/licenses/MIT).
+
+[![License](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![GitHub Repo stars](https://img.shields.io/github/stars/1j01/jspaint?label=GitHub%20Stars&style=social)](https://github.com/1j01/jspaint/stargazers)
+[![GitHub forks](https://img.shields.io/github/forks/1j01/jspaint?style=social)](https://github.com/1j01/jspaint/network/members)
+

index.html

@@ -108,6 +108,9 @@
 			</div>
 
 		</div>
+		<p>Open source under the permissive
+			<a href="https://github.com/1j01/jspaint/blob/master/LICENSE.txt">MIT License</a>.
+		</p>
 		<p>JS Paint is a web-based remake of MS Paint by <a href="https://isaiahodhner.io/">Isaiah Odhner</a>.</p>
 		<p>Read about the project and extra features on <a href="https://github.com/1j01/jspaint#readme">the readme</a>.
 		</p>