Well, Copenhagen is a city of bikes. It is by far the easiest way to get around with one.
Either you can rent a bike, or use the city bikes. There is a parking station for the city bikes right outside the main venue.
If you prefer using public transportation, you have several opportunities:
Bus 8a stops 80 m from the venue (“Nordhavn st.”),
Bus 3a stops 550 m from the venue (“Strandboulevarden/Nordre Frihavnsgade”).
There is a train station (Nordhavn) 350 m from the venue (see route)
You can see a map of all the meeting places and venues for the CPH:LX 2017 here.