Bitnami Launchpad for DigitalOcean is now avaiable, so I need to
know if under my own domain can I get Magento and Discourse at the same
time.
For intanse, If you enter to my Magento website mywebstore.com and forum mywebstore/forum in order to access to both
links under a same domain. Is this possible or do I have to open a new
domain TLDs type like for example raamstore.forum or similar?
Definitely you can install Magento and Discourse at the same domain. Moreover, you can install it in the both combinations: store in subdirectory or forum in subdirectory.
I have a Discourse forum at the domain root and Magento 2.0 store at subdirectory: