fix: should be able to run tests without .env

hardhat.config.ts

@@ -4,20 +4,22 @@ import { HardhatUserConfig, task } from "hardhat/config";
 import "@nomiclabs/hardhat-waffle";
 import "hardhat-gas-reporter";
 import "solidity-coverage";
+import { NetworksUserConfig } from "hardhat/types";
 
 dotenv.config();
 const {GOERLI_URL,PRIVATE_KEY} = process.env;
 
-
-// This is a sample Hardhat task. To learn how to create your own go to
-// https://hardhat.org/guides/create-task.html
-task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {
-  const accounts = await hre.ethers.getSigners();
-
-  for (const account of accounts) {
-    console.log(account.address);
-  }
-});
+const getNetworkConfig = (): NetworksUserConfig | undefined => {
+    if (GOERLI_URL && PRIVATE_KEY) {
+        return {
+            goerli: {
+              url: GOERLI_URL,
+              accounts: [PRIVATE_KEY],
+            }
+        };
+    }
+    return undefined;
+}
 
 // You need to export an object to set up your config
 // Go to https://hardhat.org/config/ to learn more
@@ -30,12 +32,7 @@ const config: HardhatUserConfig = {
       version: "0.8.15"
     }],
   },
-  networks: {
-    goerli: {
-      url: GOERLI_URL,
-      accounts: [`${PRIVATE_KEY}`]
-    }
-  }
+  networks: getNetworkConfig()
 };
 
 export default config;