Install the required Node modules (only needed the first time).
npm install
Start the replica, then build and install the canisters.
dfx start --background
dfx build
dfx canister install --all
Open the canister frontend in your web browser.
ID=$(xxd -u -p canisters/linkedup/_canister.id)
CRC=$(python2 -c "import crc8;h=crc8.crc8();h.update('$ID'.decode('hex'));print(h.hexdigest())")
xdg-open "http://127.0.0.1:8000/?canisterId=ic:$ID$CRC"