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Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

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package main

import (
	"fmt"
	"github.com/julienschmidt/httprouter"
	"log"
	"net/http"
)

// The type of our middleware consists of the original handler we want to wrap and a message

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# Backup
docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

# Restore
cat backup.sql | docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

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1. Configure server: Nginx

Create the certificate:

$ sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/ssl/private/nginx-selfsigned.key -out /etc/ssl/certs/nginx-selfsigned.crt

Create a strong Diffie-Hellman group:

$ sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 2048

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if (req.method === 'OPTIONS') {
      console.log('!OPTIONS');
      var headers = {};
      // IE8 does not allow domains to be specified, just the *
      // headers["Access-Control-Allow-Origin"] = req.headers.origin;
      headers["Access-Control-Allow-Origin"] = "*";
      headers["Access-Control-Allow-Methods"] = "POST, GET, PUT, DELETE, OPTIONS";
      headers["Access-Control-Allow-Credentials"] = false;
      headers["Access-Control-Max-Age"] = '86400'; // 24 hours
      headers["Access-Control-Allow-Headers"] = "X-Requested-With, X-HTTP-Method-Override, Content-Type, Accept";

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.vagrant

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Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

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const a = (cb) => {
  cb()
  .then((res) => console.log(res))
  .catch(error => {
    console.log('Error caught', error.message)
  })
}

const b = async() => {
  throw new Error('new error')

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{"lastUpload":"2019-03-25T05:11:44.124Z","extensionVersion":"v3.2.7"}

lon-io

import * as React from 'react';
import { mount } from 'enzyme';
import sinon from 'sinon';

function isImageLoaded(img: HTMLImageElement) {
  return img.complete && img.naturalHeight > 0;
}

type Props = {
  src: string,