[add] mime negotiation on node/page generation (#2302)
[add] mime negotiation on node/page generation (#2302)


MasakiInaya/shirasagi,ShinjiTanimoto/shirasagi,shirasagi/ss-handson,shirasagi/ss-handson,sunny4381/shirasagi,MasakiInaya/shirasagi,ShinjiTanimoto/shirasagi,mizoki/shirasagi,shirasagi/shirasagi,tany/ss,itowtips/shirasagi,tany/ss,MasakiInaya/shirasagi,mizoki/shirasagi,sunny4381/shirasagi,sunny4381/shirasagi,tany/ss,shirasagi/shirasagi,shirasagi/shirasagi,MasakiInaya/shirasagi,mizoki/shirasagi,sunny4381/shirasagi,shirasagi/ss-handson,ShinjiTanimoto/shirasagi,itowtips/shirasagi,itowtips/shirasagi,mizoki/shirasagi,shirasagi/shirasagi,shirasagi/ss-handson,ShinjiTanimoto/shirasagi,tany/ss,itowtips/shirasagi