Was Dubrovnik bombed? Yes.
The old city was hit by medium caliber shells and the harbour was hit with small anti-tank missiles.
I didn't read I was simply watching the news in 1991. Small Anti-tank AT-3 Sagger missiles hit the walls doing little damage and hit several boats. Some hit roof tops. It was a waste of wire guided missiles with no military gain.
Were the Croatians drawing fire? Most probably.
In all it was waste of time on the Serb side and the only result was bad publicity for them.
A Macedonian admiral Bocinov in the Yugoslav navy was on a ship near the city of Split in Croatia when he was ordered to bomb it. The order was so stupid that he refused it and got sacked on the spot.