Docker: PhpMyAdmin has an upload limit of 2048KiB

Use like this UPLOAD_LIMIT env in docker. This is from my docker-compose.yml. Default value for UPLOAD_LIMIT is 2048K which is 2048KiB. Setting value to 300M increases it to 300MiB.

Reference: https://github.com/phpmyadmin/docker#environment-variables-summary

 phpmyadmin:
    image: phpmyadmin/phpmyadmin
    container_name: 'php7.3-phpmyadmin'
    restart: 'always'
    links:
      - mysql
    environment:
      PMA_HOST: mysql
      PMA_PORT: 3306
      UPLOAD_LIMIT: 300M
    ports:
      - '8082:80'
    volumes:
      - /sessions

I implemented UPLOAD_LIMIT ENV variable in

https://github.com/phpmyadmin/docker/pull/261/files#diff-80edf79b0f382a3c6e871ac209ffd6abR57

you need to use UPLOAD_LIMIT inside enviroment, and you need to specify values with = sign, like example: UPLOAD_LIMIT=300M

version: '3.1'
services:
  db:
    image: mysql
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: somerandompasswordgenerated
    ports:
      - 3306:3306

  phpmyadmin:
    image: phpmyadmin
    restart: always
    ports:
      - 8080:80
    environment:
      - PMA_ARBITRARY=1
      - UPLOAD_LIMIT=300M