Overlay or Watermark Images by Merging with Another Image

Instructions This automation overlays a background image with another image, making it easy to add watermarks or logos. You can use this automation to watermark your images by overlaying them with a transparent version of your logo. If you'd like to place your logo in a specific corner, feel free to adjust the position of the overlay image in the code node. How it Works Both images are downloaded, so we can process binary files (you can modify the source, tho.) We extract metadata, focusing on the dimensions of each image. The position of the overlay image is calculated (default: dead center of the background image). The two images are composited together. Limitations and Optimisation Opport

Help me set up the n8n workflow "Overlay or Watermark Images by Merging with Another Image" (https://n8n.io/workflows/2459). It uses: Edit Image, HTTP Request, Code. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.