503 The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later. nuxt js - server

Question

My site was running fine and then I updated nuxt.config.js. Then after that, the site starts to show Service Unavailable.
I am using pm2 to start / deploy the app. Its vps server with apache in it.
Its showing:
Service Unavailable
The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
But, if I run npm run dev the site loads fine without any issue. Also, I checked the status with pm2 list, it showing the app is online.
My package.json
{
"name": "nuxtjs",
"version": "1.0.0",
"private": true,
"scripts": {
"dev": "nuxt --hostname domain.link --port 49000",
"build": "nuxt build",
"start": "nuxt start",
"generate": "nuxt generate",
"deploy": "pm2 start npm --name nuxtjs -- start"
},
"dependencies": {
"#nuxtjs/axios": "^5.13.6",
"#yeger/vue-masonry-wall": "^3.0.16",
"core-js": "^3.19.3",
"nuxt": "^2.15.8",
"pm2": "^5.1.2",
"vue": "^2.6.14",
"vue-server-renderer": "^2.6.14",
"vue-template-compiler": "^2.6.14",
"webpack": "^4.46.0"
},
"devDependencies": {},
"config": {
"nuxt": {
"host": "0.0.0.0",
"port": "49000"
}
}
}
My nuxt.config:
import { join } from "path";
export default {
target: "static",
// Global page headers: https://go.nuxtjs.dev/config-head
head: {
title: "Project Title",
htmlAttrs: {
lang: "en",
},
meta: [
{ charset: "utf-8" },
{ name: "viewport", content: "width=device-width, initial-scale=1" },
{ hid: "description", name: "description", content: "" },
{ name: "format-detection", content: "telephone=no" },
{ property: "og:title", content: "Project Title" },
{
property: "og:image",
content: "https://lovealabradoodle.com/images/two.jpg",
},
{
property: "og:description",
content:
"Content here",
},
],
link: [
{ rel: "icon", type: "image/x-icon", href: "/favicon.ico" },
{
rel: "stylesheet",
href: "https://fonts.googleapis.com/css?family=Roboto:400,600,700%7CMontserrat:400,500,600,700",
},
{
rel: "stylesheet",
href: "https://use.fontawesome.com/releases/v5.15.4/css/all.css",
},
{
rel: "stylesheet",
href: join("/", `fonts/flaticon/flaticon.css`),
},
{
rel: "stylesheet",
href: join("/", `css/bootstrap.min.css`),
},
{
rel: "stylesheet",
href: join("/", `css/plugins.css`),
},
{
rel: "stylesheet",
href: join("/", `css/magnific-popup.css`),
},
{
rel: "stylesheet",
href: join("/", `css/aos.css`),
},
{
rel: "stylesheet",
href: join("/", `css/style.css`),
},
{
rel: "stylesheet",
href: join("/", `css/styles/maincolors.css`),
},
],
script: [
// {
// src: "js/jquery.min.js",
// body: true,
// },
{
src: join("/", `js/bootstrap.bundle.min.js`),
body: true,
},
{
src: join("/", `js/imagesloaded.pkgd.min.js`),
body: true,
},
{
src: join("/", `js/isotope.pkgd.min.js`),
body: true,
},
{
src: join("/", `js/jquery.magnific-popup.min.js`),
body: true,
},
{
src: join("/", `js/easing.min.js`),
body: true,
},
{
src: join("/", `js/aos.js`),
body: true,
},
{
src: join("/", `js/custom-nuxt.js`),
body: true,
},
],
bodyAttrs: {
id: "top",
},
},
// Global CSS: https://go.nuxtjs.dev/config-css
css: [
// "~/static/css/bootstrap.min.css",
// "~/static/css/plugins.css",
// "~/static/css/magnific-popup.css",
// "~/static/css/aos.css",
// "~/static/css/style.css",
// "~/static/css/styles/maincolors.css",
],
//Global JS
// script: [
// "~assets/js/custom.js"
// ],
// Plugins to run before rendering page: https://go.nuxtjs.dev/config-plugins
plugins: [],
// Auto import components: https://go.nuxtjs.dev/config-components
components: {
path: "~/components", // will get any components nested in let's say /components/test too
pathPrefix: false,
},
// Modules for dev and build (recommended): https://go.nuxtjs.dev/config-modules
buildModules: [],
// Modules: https://go.nuxtjs.dev/config-modules
modules: [
// https://go.nuxtjs.dev/axios
"#nuxtjs/axios",
],
// Axios module configuration: https://go.nuxtjs.dev/config-axios
axios: {
// Workaround to avoid enforcing hard-coded localhost:3000: https://github.com/nuxt-community/axios-module/issues/308
baseURL: "http://api.domain.link/api",
retry: { retries: 3 },
},
publicRuntimeConfig: {
axios: {
baseURL: "http://api.domain.link/api",
},
},
// Build Configuration: https://go.nuxtjs.dev/config-build
build: {
extractCSS: true,
},
};

Answer 1

I ran yarn/npm install and it worked for me