GNU General Public License v3.0
Permissions of this strong copyleft license are conditioned on making available complete source code of licensed works and modifications, which include larger works using a licensed work, under the same license. Copyright and license notices must be preserved. Contributors provide an express grant of patent rights.
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Create a text file (typically named COPYING, as per GNU conventions) in the root of your source code and copy the text of the license into the file.
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