Add Docker Compose example for MariaDB

docker/compose/withMariaDB/README.md

@@ -0,0 +1,26 @@
+# n8n with MariaDB
+
+Starts n8n with MariaDB as database.
+
+
+## Start
+
+To start n8n with MariaDB simply start docker-compose by executing the following
+command in the current folder.
+
+
+**IMPORTANT:** But before you do that change the default users and passwords in the [`.env`](.env) file!
+
+```
+docker-compose up -d
+```
+
+To stop it execute:
+
+```
+docker-compose stop
+```
+
+## Configuration
+
+The default name of the database, user and password for MariaDB can be changed in the [`.env`](.env) file in the current directory.