lcube45

<?php
/**
* @file
* Contains \Drupal\my_contact\Form\ContactForm.
*/

namespace Drupal\my_contact\Form;

use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;

lcube45

RUN apt update
RUN apt upgrade -y
RUN apt install -y apt-utils
RUN a2enmod rewrite
RUN apt install -y libmcrypt-dev
RUN docker-php-ext-install mcrypt
RUN apt install -y libicu-dev
RUN docker-php-ext-install -j$(nproc) intl
RUN apt-get install -y libfreetype6-dev libjpeg62-turbo-dev libpng12-dev
RUN docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ 

lcube45

Render custom blocks

$bid = 'myblock';
$block = \Drupal\block_content\Entity\BlockContent::load($bid);
$render = \Drupal::entityTypeManager()->getViewBuilder('block_content')->view($block);

Render plugin blocks

$block_manager = \Drupal::service('plugin.manager.block');