readme updated

Author: daimor

README.md

@@ -9,12 +9,42 @@ Pre-requisites
 This dialect requires SQLAlchemy, InterSystems DB-API driver. They are specified as requirements so ``pip``
 will install them if they are not already in place. To install, just:
 
-    pip install sqlalchemy-iris
+```shell
+pip install sqlalchemy-iris
+```
 
 Usage
 ---
 
 In your Python app, you can connect to the database via:
 
-    from sqlalchemy import create_engine
-    engine = create_engine("iris://_SYSTEM:SYS@localhost:1972/USER")
+```python
+from sqlalchemy import create_engine
+engine = create_engine("iris://_SYSTEM:SYS@localhost:1972/USER")
+```
+
+InterSystems IRIS
+---
+
+You can run your instance of InterSystems IRIS Community Edition with Docker 
+
+```shell
+docker run -d --name iris \
+ -p 1972:1972 \
+ -p 52773:52773 \
+ intersystemsdc/iris-community:preview
+```
+
+_Port 1972 is used for binary communication (this driver, xDBC and so on), and 52773 is for web (Management Portal, IRIS based web-applications and API's)._
+
+The System Management Portal is available by URL: `http://localhost:52773/csp/sys/UtilHome.csp`
+
+The default password - `SYS`, has to be changed after the first login to the management portal. Or start the container with a command that resets the change password flag
+
+```shell
+docker run -d --name iris \
+ -p 1972:1972 \
+ -p 52773:52773 \
+ intersystemsdc/iris-community:preview \
+ -a "iris session iris -U%SYS '##class(Security.Users).UnExpireUserPasswords(\"*\")'"
+```