Change license to CC-BY-NC-ND 4.0 international.

Also, fix the link to GitLab and include a copy of the license.

LICENSE.txt

+Attribution-NonCommercial-NoDerivatives 4.0 International
+
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+Creative Commons Attribution-NonCommercial-NoDerivatives 4.0
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README.md

@@ -38,12 +38,13 @@ pipenv run clean
 
 ## License
 
-This software is licensed under the [Creative Commons - Attribution 4.0
-International license](https://creativecommons.org/licenses/by/4.0/).
+This software and content are licensed under the
+[Creative Commons - Attribution-NonCommercial-NoDerivatives 4.0 International license](https://creativecommons.org/licenses/by/4.0/)
+(see `LICENSE.txt).
 
 ## Author Information
 
 Nimrod Adar, [contact me](mailto:nimrod@shore.co.il) or visit my [website](
 https://www.shore.co.il/). Patches are welcome via [`git send-email`](
 http://git-scm.com/book/en/v2/Git-Commands-Email). The repository is located
-at: <https://git.shore.co.il/>.
+at: <https://git.shore.co.il/explore>.