Link version update

To update the Link using Docker you must:

Check the current version of the server (in the left low corner of the Login page in the Link web interface).
In the repository check if there are no update peculiarities for the version you want to install. If there is, read the attached manual and complete the instructions.
Login to your server via SSH.
Login as a superuser: sudo su, and enter the same password one more time.
Follow the directory where your Link is:
```
cd/home/link/
```
Choose the correct type of Link server. If you use the Link:
1. with SIP, but not using the domain name (e.g. http://176.215.90.19, http://3.111.25.45) perform:
```
cd with-sip
```
2. with SIP, and with domain name (e.g. https://preview.intercom.team) perform:
```
cd with-sip/with-web-proxy
```
3. without SIP, and without domain (simply management features) perform:
```
cd without-sip
```
4. without SIP, but with domain (simply management features + SSL) perform:
```
cd without-sip/with-web-proxy
```
Stop the current Link server with the command:
```
 docker-compose down
```
It should be run in the directory with the corresponding type that you are use.
Update installation images from which the new Link version will be deployed:
```
docker-compose pull
```
Start your updated Link server in some seconds: docker-compose up -d
```
docker-compose up -d
```
As a result new version will start functioning. Make sure that all of your containers are started and running properly:
```
docker ps
```
Login to the Link using the previous IP/domain.