from https://lifehacker.com/how-to-overwinter-your-pepper-plants-1850800893 9/8/2023
Note that there is much more information on the lifehacker page than I've collected here.

If you overwinter your pepper plants, while it won't produce peppers, it will be ready for next year, no need for seedlings.

Peppers are not frost tolerant. It's best to bring them inside once you have a few consistent days of 40-degree nights.

• The plant needs to live in a room that can remain 50-65 degrees Fahrenheit.
• There should be light coming in from a window; if not, then use a plant light for 2-3 hours/day
• The plants will be hibernating. During this time, they don't need fertilizer and need to be watered once every two weeks or so.

• Start inside: expose the plant to more hours of sunlight or plant lights each day, water so roots are moist but never damp.
• As it begins to grow leaves, give it fish fertilizer per the instructions on the container.