Update CONTRIBUTING.md and LICENSE

Author: alexv-smirnov

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,5 +1,3 @@
-I hereby agree to the terms of the CLA available at: https://yandex.ru/legal/cla/?lang=en
-
 <!--- Please provide a general summary of your changes in the title above -->
 
 ## Pull request type

CONTRIBUTING.md

@@ -0,0 +1,21 @@
+# Notice to external contributors
+
+## Common
+
+YDB is a free and open project and we appreciate to receive contributions from our community.
+
+## Contributing code changes
+
+If you would like to contribute a new feature or a bug fix, please discuss your idea first on the GitHub issue.
+If there is no issue for your idea, please open one. It may be that somebody is already working on it,
+or that there are some complex obstacles that you should know about before starting the implementation.
+Usually there are several ways to fix a problem and it is important to find the right approach before spending time on a PR
+that cannot be merged.
+
+## Provide a contribution
+
+To make a contribution you should submit a pull request. There will probably be discussion about the pull request and, if any changes are needed, we would love to work with you to get your pull request merged.
+
+## Other questions
+
+If you have any questions, please mail us at [email protected].

LICENSE

@@ -1,11 +1,9 @@
-Copyright 2019 YANDEX LLC
+Copyright 2019-2024 YANDEX LLC
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at
-
        http://www.apache.org/licenses/LICENSE-2.0
-
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.