Add CODE_OF_CONDUCT and CONTRIBUTING to this repository

bitnami/python-snapshot/CONTRIBUTING.md

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+# Contributing Guidelines
+
+Contributions are welcome via GitHub Pull Requests. This document outlines the process to help get your contribution accepted.
+
+Any type of contribution is welcome: new features, bug fixes, documentation improvements, etc.
+
+## How to Contribute
+
+1. Fork this repository, develop, and test your changes.
+2. Submit a pull request.
+
+### Requirements
+
+When submitting a PR make sure that:
+- It must pass CI jobs for linting and test the changes (if any).
+- It must follow [container best practices](https://engineering.bitnami.com/articles/best-practices-writing-a-dockerfile.html).
+- The title of the PR is clear enough.
+- If necessary, add information to the repository's `README.md`.
+
+### PR Approval and Release Process
+
+1. Changes are manually reviewed by Bitnami team members usually within a business day.
+2. Once the changes are accepted, the PR is tested (if needed) into the Bitnami CI pipeline, the container is deployed and tested (verification and functional tests) using docker-compose and Helm (if there is an associated Helm Chart).
+3. The PR is merged by the reviewer(s) in the GitHub `master` branch.
+4. Then our CI/CD system is going to push the container image to the different registries including the recently merged changes.
+
+***NOTE***: Please note that, in terms of time, may be a slight difference between the appearance of the code in GitHub and the image with the changes in the different registries.