Derailleur replacement recommendation I have been experiencing some issues with my rear derailleur. I played around with it quite a bit to adjust it correctly. Finally after giving up, I took it to the shop and the guy showed me that the rear derailleur is bent, plus the chain is stretched. So, I am considering changing it along with the chain. 

I need some recommendations, not necessarily on the exact model, but the type of derailleurs. The person at the shop recommended Shimano Deore. But I noticed that these seem to be for mountain bikes. My bike is more of a hybrid (if that is what it is called) La pierre Shaper 100. 

Would regular road bike derailleur's work? I use the bike mainly for commute (36kms/20miles daily). 

Would really welcome suggestions, thoughts, etc? 

Thanks

Edit. Down the line I might consider changing the rear cassette from 8 to 9, or maybe 10, will the front derailleur have to match up with the new cassette at the back and the new rear derailleur to make sure each gear in the front has a big enough range for gears at the back without the chain touching the front derailleur?
According to your link - your bike is 8 speed.
The bog standard (excludes the upper-end XT variant) Deore derailleur has only ever been produced in 9/10 speed.
And one assumes - you are looking at the latest 10 speed version.
An 8 speed chain is significantly wider than a 10 speed chain. Consequently, the chain may have problems with not only the jockey wheels of a 10 speed derailleur but also passing through the cage of the mechanism.
Additionally, MTB rear mechs - can run much wider range of gears and therefore can have a longer cage to facilitate this. With the range of gears on the link - you would require a medium cage rear mech.

You bike runs the Shimano 2300 range. And I would recommend sticking to this or something like the Shimano Claris range. These are also road specific &amp; probably cheaper than a Deore rear mech.