Update readme

Author: tmachyshyn

README.md

@@ -15,8 +15,6 @@ Article map:
 Use a prebuilt version for a production instance, https://hub.docker.com/r/espocrm/espocrm.
 
 ```
-version: '3.8'
-
 services:
 
   espocrm-db:
@@ -84,56 +82,11 @@ volumes:
 
 Run `docker compose up -d`, wait for it to initialize completely, and visit `http://localhost:8080`.
 
-### Legacy Usage (EspoCRM v6.1.7 and earlier)
-
-```
-version: '3.1'
-
-services:
-
-  mysql:
-    container_name: mysql
-    image: mysql:8
-    command: --default-authentication-plugin=mysql_native_password
-    restart: always
-    environment:
-      MYSQL_ROOT_PASSWORD: example
-    volumes:
-      - mysql:/var/lib/mysql
-
-  espocrm:
-    container_name: espocrm
-    image: espocrm/espocrm
-    environment:
-      ESPOCRM_DATABASE_PASSWORD: example
-      ESPOCRM_ADMIN_USERNAME: admin
-      ESPOCRM_ADMIN_PASSWORD: password
-      ESPOCRM_SITE_URL: "http://localhost:8080"
-    restart: always
-    ports:
-      - 8080:80
-    volumes:
-     - espocrm:/var/www/html
-
-  espocrm-cron:
-    image: espocrm/espocrm
-    volumes:
-     - espocrm:/var/www/html
-    restart: always
-    entrypoint: docker-cron.sh
-
-volumes:
-  mysql:
-  espocrm:
-```
-
 ### Usage (only for development)
 
 Example `docker-compose.yml`:
 
 ```
-version: '3.1'
-
 services:
 
   mysql: