I have a live server running a full GETH NODE in which I need to sign a transaction with a private key. The problem is I dont know how I can use the private key without explicitly providing the private key to the server. Is using hash corp a good option or is their any easier way?Is there a way to leverage having full GETH NODE to advantage?

const privateKey1 = Buffer.from(process.env.PRIVATE_KEY_1,'hex')
var wallet = new ethers.Wallet(privateKey1,provider)

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