UPDATE materials SET image = '/assets/real-solar-energy.png' WHERE slug = 'solar-energy';
UPDATE materials SET image = '/assets/real-networks-internet.png' WHERE slug = 'networks-internet';
UPDATE materials SET image = '/assets/real-surveillance-cameras.png' WHERE slug = 'surveillance-cameras';
UPDATE materials SET image = '/assets/real-fire-alarm.png' WHERE slug = 'fire-alarm';
UPDATE materials SET image = '/assets/real-audio-systems.png' WHERE slug = 'audio-systems';
UPDATE materials SET image = '/assets/real-integrated-security.png' WHERE slug = 'integrated-security';