How do we create a web wallet for Bitcoin?

How do we create a web wallet for Bitcoin?

  1. Is possible to create an online bitcoin web wallet with a single full node on cloud..???

    1. The working of web wallet like coinbase is use single full node cloud setup for creating multiple wallet account..?

    2. The private key of online web(like coinbase) wallet is possible view the wallet owner..?

    3. How to create multiple wallet for multiple users using single full node RPC call...?? Actually this is possible..??

Thanks in advance..

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