Merge pull request #558 from vin-yu/patch-1

adding MSSQL_ERROR_LOG_FILE

Author: v-shils

docs/linux/sql-server-linux-configure-environment-variables.md

@@ -48,6 +48,7 @@ You can use several different environment variables to configure SQL Server 2017
 | **MSSQL_AGENT_ENABLED** | Enable SQL Server Agent. For example, 'true' is enabled and 'false' is disabled. By default, agent is disabled.  |
 | **MSSQL_MASTER_DATA_FILE** | Sets the location of the master database data file. |
 | **MSSQL_MASTER_LOG_FILE** | Sets the location of the master database log file. |
+| **MSSQL_ERROR_LOG_FILE** | Sets the location of the errorlog files. |
 
 
 ## Example: initial setup