Here is my baby.conf to run MN at home computer:

enablezeromint=0
rpcuser=user
rpcpassword=password
rpcallowip=127.0.0.1
rpcport=3333
server=1
gen=1
genproclimit=3
listen=1
daemon=1
staking=1
port=55442
masternode=1
masternodeaddr=XXX.XXX.XXX.XXX:55442
externalip=XXX.XXX.XXX.XXX:55442
masternodeprivkey=SOME_KEY

and also masternode.conf:

localmn1 XXX.XXX.XXX.XXX:55442 SOME_KEY TX_ID TX_INDEX

Do not forget to specify your static IP that accessible from internet instead of XXX.XXX.XXX.XXX and check what your router is forward incomming requests to port 55442 to the same port on your home PC