This Dapp has been created for proof of concept purpose. Don't use it on production without review the code.
Run geth with at least the following arguments :
geth --unlock "Ethereum Public Address" --rpccordsdomain "http://localhost:3000"
You can use --rpcorsdomain "*" but you need to understand that any website can access to your wallet.
In the /DocSign, run
meteor
Or build the client with the following command
meteor-build-client ../build -p ""
and open index.html with your browser.
Run meteor as usual. Run Ethereum wall with mist argument
For Mac users
open -a Ethereum-Wallet.app --args --mode mist
For Windows users
Ethereum-Wallet.exe --mode mist
And open http://localhost:3000