How to search from multiple field without case sensitively in mongodb node js?

        app.get('/all-images', async (req, res) => {
            const searchQuery = req.query.searchQuery || '';


            if (!searchQuery) {
                return res.status(400).json({ error: 'Search query is required' });
            }

            const findingResult = await driveImagesCollection.find({
                // find the search  query both from name, description and keywords field 
                $or: [
                    { "imageUrls.name": { $regex: searchQuery, $options: 'i' } }, // $options:'i' --> its mean case insensitive
                    { "imageUrls.description": { $regex: searchQuery, $options: 'i' } },
                    { "imageUrls.keyWords": { $regex: searchQuery, $options: 'i' } },
                ]
            }).toArray();

            // Flatten the findingResult to include all matching imageUrls
            const matchedImages = findingResult.flatMap(doc =>
                doc.imageUrls.filter(image => {
                    // it filter the searching query both the name, description and keyWords field
                    return image?.name.toLowerCase().includes(searchQuery.toLowerCase()) || image?.description.toLowerCase().includes(searchQuery.toLowerCase()) || image?.keyWords.toLowerCase().includes(searchQuery.toLowerCase())
                })
            );



            res.send(matchedImages)
        })