Описание изменений

backend/hardhat.config.js

@@ -0,0 +1,13 @@
+require('dotenv').config()
+require('@nomicfoundation/hardhat-ethers')
+require('@nomicfoundation/hardhat-chai-matchers')
+
+module.exports = {
+  solidity: "0.8.0",
+  networks: {
+    sepolia: {
+      url: process.env.SEPOLIA_URL,
+      accounts: [process.env.PRIVATE_KEY]
+    }
+  }
+}