Update to support redirect back to previous url after signin
Update to support redirect back to previous url after signin

jackycute/HackMD,jackycute/HackMD,Yukaii/hackmd,hackmdio/hackmd,PeterDaveHello/hackmd,PeterDaveHello/hackmd,PeterDaveHello/hackmd,Rwing/hackmd,ironhack/hackmd,xnum/hackmd,jccrofty30/hackmd,hackmdio/hackmd,Rory80Hz/hackmd,Yukaii/hackmd,Rwing/hackmd,hackmdio/hackmd,ironhack/hackmd,aswathyjacob8/newtest,Rory80Hz/hackmd,xnum/hackmd,aswathyjacob8/newtest,Yukaii/hackmd,xnum/hackmd,jackycute/HackMD,Rwing/hackmd,aswathyjacob8/newtest,ironhack/hackmd,jccrofty30/hackmd,jccrofty30/hackmd,Rory80Hz/hackmd