raspberry pi sudo apt-get update error (5 stars) (more work later)

Please note I have a raspberry pi needs update and is erroring

Have others but hope you can show me an easy solution?

sudo apt-get update
Hit:1 http://archive.raspberrypi.org/debian buster InRelease
Ign:2 https://download.docker.com/linux/raspbian bionic InRelease
Err:3 https://download.docker.com/linux/raspbian bionic Release
404 Not Found [IP: 99.84.126.9 443]
Hit:4 http://raspbian.raspberrypi.org/raspbian buster InRelease
Hit:5 https://packages.cloud.google.com/apt kubernetes-xenial InRelease
Reading package lists… Done
E: The repository ‘https://download.docker.com/linux/raspbian bionic Release’ does not have a Release file.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
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let me know your thoughts and any questions

While this is hourly; there is a max of $15 that I can pay, as being a cancer patient is tuff and been out of work. Hourly will give you more $ as there is less money taken between us from freelancer

There is hope you can give your “best” price; unemployed, and have cancer with bills backing up, $15 possible? Glowing paragraph of feedback 5 stars

My funds are low but will pay quick and leave 5 stars. Please give your best possible for your bid ? (something reasonable?) Please note there is hope we can mutually complete this task; we can leave each other nice comments and 5 stars for each? Look at feedback on my profile, feedback I left for many others. Here is the project:

SINCERELY WOULD BE NICE TO MEET YOU PLEASE

ANY THOUGHTS ? Please note project is due in two hours as this projects deadline, as this is needed if we can get some done – then we can talk about next steps and 5 stars and another job also. If this is a good one and we are “successful”; would need a couple others setup, but will handle one at a time? Can you do this for something reasonable in a couple hours? thoughts ?