Added Percona container as an alternative to mysql mariadb

env-example

@@ -70,6 +70,13 @@ MYSQL_PASSWORD=secret
 MYSQL_PORT=3306
 MYSQL_ROOT_PASSWORD=root
 
+### Percona Container
+PERCONA_DATABASE=homestead
+PERCONA_USER=homestead
+PERCONA_PASSWORD=secret
+PERCONA_PORT=3306
+PERCONA_ROOT_PASSWORD=root
+
 ### MSSQL Container
 MSSQL_DATABASE=homestead
 MSSQL_PASSWORD=yourStrong(!)Password