Create a visually stunning 8K ultra- detailed image centered around the singular main generator in a Frostpunk city. Depict this colossal machine as the lifeline of the city, radiating warmth against the icy backdrop of a post- apocalyptic landscape. Capture the intricate details of the generator's machinery, emphasizing its critical role in sustaining life. Illustrate the city's inhabitants huddled around the generator, their faces reflecting a mix of desperation, hope, and determination. Use lighting to convey the contrast between the frigid external environment and the comforting glow emitted by the generator. Portray the city's struggle for survival as it relies on this central power source, making the image a poignant representation of humanity's resilience in the face of a frozen, unforgiving world in the Frostpunk universe