To run the web app locally, use npm to install http-server, and run it from the project root directory.
Rinkeby network smart contract address integrating with compound: 0xd6801a1DfFCd0a410336Ef88DeF4320D6DF1883e (https://compound.finance/docs#networks)
Run the code below in your terminal: ganache-cli -f "https://rinkeby.infura.io/v3/502b002c20104834a8fbda450229f913" -m "there mnemonic 12 words"
After stake, you can see your cTokens in metamask by importing Token Contract Address as above of rinkeby.
Etherscan rinkeby where you can check : https://rinkeby.etherscan.io/address/0xd6801a1dffcd0a410336ef88def4320d6df1883e#readContract