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Knex Setup Guide

Create your project directory

Create and initialize your a directory for your Express application.

$ mkdir node-knex-demo
$ cd node-knex-demo
$ npm init

How to configure HTTPS with Lets Encrypt, Nginx reverse proxy, Express and Node

Have a Node app ready for production.
Create an app.js file in your project directory:

const express = require('express');
const path = require('path');
const app = express();

// Allow dotfiles - this is required for verification by Lets Encrypt's certbot

Intro

This is a basic collection of things I do when setting up a new headless ubuntu machine as a webserver. Following the steps below should give you a reasonable secure server with HTTP/2 support (including ALPN in chrome) and the fast NGINX server. I am happy to add things so leave a comment.

Basics

After creating the server (droplet on DigitalOcean) log in with

How to setup Let's Encrypt for Nginx on Ubuntu 16.04 (including IPv6, HTTP/2 and A+ SLL rating)

There are two main modes to run the Let's Encrypt client (called Certbot):

Standalone: replaces the webserver to respond to ACME challenges
Webroot: needs your webserver to serve challenges from a known folder.

Webroot is better because it doesn't need to replace Nginx (to bind to port 80).

In the following, we're setting up mydomain.com. HTML is served from /var/www/mydomain, and challenges are served from /var/www/letsencrypt.

	class CircuitBreaker {
	constructor(request, options = {}) {
	const defaults = {
	failureThreshold: 3,
	successThreshold: 2,
	timeout: 6000
	}
	Object.assign(this, defaults, options, {
	request,
	state: "CLOSED",

	CREATE TABLE test
	(
	id INTEGER,
	parent INTEGER
	);


	INSERT INTO test (id, parent) VALUES
	(1, NULL),
	(2, 1),

	const pg = require('pg')

	// create a config to configure both pooling behavior
	// and client options
	// note: all config is optional and the environment variables
	// will be read if the config is not present
	var config = {
	user: '', // env var: PGUSER
	database: '', // env var: PGDATABASE
	password: '', // env var: PGPASSWORD

	# Note (November 2016):
	# This config is rather outdated and left here for historical reasons, please refer to prerender.io for the latest setup information
	# Serving static html to Googlebot is now considered bad practice as you should be using the escaped fragment crawling protocol

	server {
	listen 80;
	listen [::]:80;
	server_name yourserver.com;

	root /path/to/your/htdocs;

	# Enter this command to create a sudoers override/include file:
	# sudo visudo -f /etc/sudoers.d/nginx.overrides

	# (Make sure you actually have this in your /etc/sudoers - Run `sudo visudo` to check)
	# #includedir /etc/sudoers.d

	# This file assumes your deployment user is `deploy`

	# Nginx Commands
	Cmnd_Alias NGINX_RESTART = /usr/sbin/service nginx restart

	#!/usr/bin/env bash

	if [ $EUID -ne 0 ]; then
	echo "You must be root: \"sudo ngxdis\""
	exit 1
	fi

	# -z str: Returns True if the length of str is equal to zero.
	if [ -z "$1" ]; then
	echo "Please choose a site."