Add README

Author: bartosjiri

README.md

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+# Files
+
+The PeopleDAO's files repository with [website](https://people-dao.com) routing support.
+
+## How to use
+
+You can link any files in the repository using the `https://people-dao.com/` address followed by file location path:
+
+1. Upload the target file to desired location in the repository.
+2. Navigate to the file through GitHub's GUI.
+3. Copy the file path from breadcrumb navigation located next to the branch dropdown selection.
+
+   - Example:
+
+     ![GUI file path example](_readme/file-path.png)
+
+4. Paste the path at the end of the PeopleDAO's website domain (`https://people-dao.com/`).
+   - Example: `https://people-dao.com/files/marketing/presentations/PeopleDAO-Season1-Retrospective.pdf`