Fixes #355: Allow port to be specified via CODEWORLD_API_PORT environment variable
Fixes #355: Allow port to be specified via CODEWORLD_API_PORT environment variable

three/codeworld,stefan-j/codeworld,tgdavies/codeworld,three/codeworld,google/codeworld,pranjaltale16/codeworld,alphalambda/codeworld,alphalambda/codeworld,stefan-j/codeworld,google/codeworld,parvmor/codeworld,pranjaltale16/codeworld,nomeata/codeworld,venkat24/codeworld,parvmor/codeworld,parvmor/codeworld,pranjaltale16/codeworld,nomeata/codeworld,nomeata/codeworld,venkat24/codeworld,google/codeworld,three/codeworld,tgdavies/codeworld,alphalambda/codeworld,tgdavies/codeworld,venkat24/codeworld,stefan-j/codeworld