Push and update files in GitHub

This workflow performs various Git operations. It starts with a manual trigger, sets the local repository path, decodes a file and then updates a file's content, adds, commits, and pushes changes to a GitHub repository, and finally pulls changes. The upper branch of the workflow retrieves a specific file ("README.md") from a GitHub repository ("gitpusharticle") owned by "teds-tech-talks." It then decodes the file's binary data into readable text using a code node. The decoded content is used to update the file by adding a timestamp and data. Finally, the modified file is pushed back to the repository using a GitHub node, completing the process of editing and updating the file directly via th

Help me set up the n8n workflow "Push and update files in GitHub" (https://n8n.io/workflows/1942). It uses: GitHub, Code. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.