Automatically optimise images added to a Google drive folder

How it works This workflow watches a selected Google Drive folder for any images added to it. It then takes that image, sends it the the tinypng.com service which optimises and reduces its size (where possible) Tinypng then returns the updated image which is then automatically saved in your chose Google Drive folder Setting things up It's pretty simple to configure and should only take around 5-10mins. You only need to set up credentials for Google Drive and Tinypng.com For Tinypng.com you can sign up for their free tier API access which gives you 500 optimisations per month Once you have those two things, you just need choose your 'input' folder to watch for images and your 'output' folder

Help me set up the n8n workflow "Automatically optimise images added to a Google drive folder" (https://n8n.io/workflows/2185). It uses: HTTP Request, Google Drive. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.