Use NODE_ENV to test for test environment; improve scripts

test/integration/setup.cjs

@@ -2,7 +2,7 @@ console.log("\nSpawning server process...");
 const { spawn } = require("child_process");
 
 module.exports = async function () {
-  const child = spawn("node", ["dev-server.cjs", "--test"]);
+  const child = spawn("node", ["server.cjs"]);
 
   child.stdout.on('data', (data) => {
     console.log(`${data}`);