How to use await for npm tasks

I am trying to build a main app that will run multiple microservices and for that i have npm install and build tasks, trying to put aysnc await for npm install tasks but it seems its not waiting for that task to complete and executing next function. is there way to wait for npm task to complete and then run next line of code or better thought to achieve this task.

index.js

const { exec } = require ('child_process');
const path = require('path');
const fs = require('fs');
const { executionAsyncResource } = require('async_hooks');

const appDirectory = __dirname;
const appDirs = fs.readdirSync(appDirectory);
let appPath;
(async () => {
console.log(appDirs);
    appDirs.forEach(appDir => {
        appPath = path.join(appDirectory, appDir);
        execute(appPath,appDir);
});

async function execute(appPath, appDir) {
    console.log("test", appDir);
    console.log(">>>>appPath", appDir);
    if(fs.lstatSync(appDir).isDirectory()) {
        appPath = path.join(appDirectory, appDir);
        await execInstall(appPath, appDir);
        console.log(`installing dependencies for ${appDir}`);
        await execBuild(appPath, appDir);
        console.log(`Buidstarted ${appDir}.........>>>>>>>`);
       await execRunApp(appPath);
        console.log(`${appDir} Build Completed>>>>>>`);
        console.log(`${appDir} App Started>>>>>>`);
    }
}

function execInstall(appPath, appDir) {
    const appInstallCmnd = "npm install";
    exec( appInstallCmnd, { cwd: appPath}, (error, stdout, stderr) => {
        if (error) {
            console.error(`Error installing dependencies for ${appDir}: ${error}`);
            return;
        }
    })
}
function execBuild(appPath, appDir) {
    const appbuildCmnd = "npm run build";
    exec(appbuildCmnd, { cwd: appPath}, (error, stdout, stderr) => {
        if(error) {
            console.error(`Error building>>>>>> ${appDir}: ${error} `);
        }
    })
}

function execRunApp(appPath, appDir) {
    const appRunLocal = "npm run serve-local";
    exec(appRunLocal, { cwd: appPath}, (error, stdout, stderr) => {
        if(error) {
            console.error(`Error Starting>>>>>> ${appDir}: ${error} `);
        }
    })
}
})();