What is St Javelin and why is it going viral amid Russia-Ukraine war?

Amid Russia-Ukraine's war, a photo of a saint holding an anti-tank missile launcher called Javelin is going viral. Hailed as St Javelin, it has become a symbol of Ukraine's resistance. Ukrainian defence is reportedly dependent on the Javelin to fight Russian troops. It is designed as a shoot and scoot weapon, which helps soldiers to run after firing the shot.