license: Change from MIT to GPL v3 (copyleft)

- Replace MIT license with GNU General Public License v3.0
- Requires derivative works to also be open source under GPL v3
- Ensures Phantom.js usage promotes open source ecosystem
- Update README.md with license information and copyleft notice
- Update package.json license field to GPL-3.0

Author: david-labs-ca

LICENSE

@@ -1,21 +1,17 @@
-MIT License
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
 
-Copyright (c) 2025 OS366
+ Copyright (C) 2025 OS366
 
-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:
+ 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.
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+ 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.
 
-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.
+ You should have received a copy of the GNU General Public License
+ along with this program.  If not, see <https://www.gnu.org/licenses/>.

README.md

@@ -192,4 +192,10 @@ See [Troubleshooting Wiki](https://github.com/OS366/phantom/wiki/Troubleshooting
 
 ## License
 
-See LICENSE file for details.
+This project is licensed under the **GNU General Public License v3.0 (GPL-3.0)**.
+
+**Important:** This is a copyleft license. If you use Phantom.js in your project, your project must also be licensed under GPL v3 and be open source.
+
+See [LICENSE](LICENSE) file for full license text.
+
+For more information about GPL v3, visit: https://www.gnu.org/licenses/gpl-3.0.html

scripts/package.json

@@ -19,7 +19,7 @@
     "integration"
   ],
   "author": "",
-  "license": "SEE LICENSE IN LICENSE",
+  "license": "GPL-3.0",
   "devDependencies": {
     "jest": "^29.7.0",
     "terser": "^5.44.1",