# How to apply a license NocoDB doesn't require a CLA (Contributor License Agreement). We require Developer Certificate of Origin (DCO) as an additional safeguard for the NocoDB project. This is a well established and widely used mechanism to assure contributors have confirmed their right to license their contribution under the project's license. ## Modifying existing file If you modify an existing file, please keep the existing license header as it is and just add your copyright notice and author: ```` @author ```` ## Creating new file ```` /** * @copyright Copyright (c) , () * * @author * * @license GNU AGPL version 3 or any later version * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see . * */ ```` ## How to sign your work ### First configure your Git username/email : Usually email will be already configured with your github. ```bash git config --global user.name "FirstName LastName" git config --global user.email "email@provider.com" ``` Refer [here](https://support.atlassian.com/bitbucket-cloud/docs/configure-your-dvcs-username-for-commits/) for additional details ```bash git add . git commit -s -m "commit message" ``` Please note : Use your real name (sorry, no pseudonyms or anonymous contributions). Once pushed - you should see the commit have the following template in github ```` Signed-off-by: FirstName Initials/Lastname ```` ## How to sign your previous work In case you forget to sign your work, you can do the following: ```bash # sign the last N commits - replace N before executing the command git rebase HEAD~N --signoff git push -f ```