I wanted to learn how users can upload files to a remote bucket. After some investigation i came up with Signed Urls, a service by Google Cloud Storage.
Tools: Express js, Docker
Basically, a logged in user asks this backend to upload a file with a filepath, let's say folder/video.mp4, to a bucket. This backend responds with a signed Url that allows the user to upload the file directly with a PUT request to gs://bucket/folder/video.mp4.
With this setup you avoid giving credentials to users.
Feel free to ask me anything, just write an issue
See also the frontend for this project.