Can this oven be built for indoor use
In a word, no. It is not designed or intended for use in a fully enclosed space. The consequences of building and using this design in an enclosed indoor space include property damage and injury or death.
If you look through the archives, you will see that some builders have constructed the oven in outdoor pavilions or rooms. In every case the area has plenty of open walls, inflammable surfaces, and special arrangements for exhausting fumes.and smoke.
There are, of course, brick wood fired pizza ovens purpose-designed and -built for indoor use, and I would look at those if you have your heart set on the concept