update README.md for PMA_SSL

Signed-off-by: TasdidurRahman <[email protected]>

Author: TasdidurRahman

README.md

@@ -158,6 +158,18 @@ In order to keep your sessions active between container updates you will need to
 -v /some/local/directory/sessions:/sessions:rw
 ```
 
+## Connect over SSL with backend
+
+Set the variable ``PMA_SSL`` to '1' and enable ssl usage from phpmyadmin to mysql server. The default value is 0. Variable ``PMA_SSLS`` can be used as a comma seperated sequence of 0 and 1 where multiple hosts are mentioned. Values order must follow the ``PMA_HOSTS`` and will be computed accordingly.
+
+```sh
+docker run --name phpmyadmin -d -e PMA_HOSTS=sslhost -e PMA_SSL=1 -p 8080:80 phpmyadmin:latest
+```
+
+```sh
+docker run --name phpmyadmin -d -e PMA_HOSTS='sslhost,nosslhost' -e PMA_SSLS='1,0' -p 8080:80 phpmyadmin:latest
+```
+
 ## Environment variables summary
 
 * ``PMA_ARBITRARY`` - when set to 1 connection to the arbitrary server will be allowed
@@ -191,6 +203,10 @@ In order to keep your sessions active between container updates you will need to
 
 For usage with Docker secrets, appending ``_FILE`` to the ``PMA_PASSWORD`` environment variable is allowed (it overrides ``PMA_PASSWORD`` if it is set):
 
+* ``PMA_SSL`` - define ssl usage for MySQL server
+
+* ``PMA_SSLS`` - comma separated list of 0 and 1 defining ssl usage for corresponding MySQL servers
+
 ```sh
 docker run --name phpmyadmin -d -e PMA_PASSWORD_FILE=/run/secrets/db_password.txt -p 8080:80 phpmyadmin:latest
 ```
@@ -206,6 +222,8 @@ docker run --name phpmyadmin -d -e PMA_PASSWORD_FILE=/run/secrets/db_password.tx
 - `PMA_CONTROLHOST`
 - `PMA_CONTROLUSER`
 - `PMA_CONTROLPASS`
+- `PMA_SSL`
+- `PMA_SSLS`
 
 ## Run the E2E tests for this docker image