Update documentation and java version in Installation section (#467)

CONTRIBUTING.md

@@ -1,8 +1,10 @@
 # Contributing
 
-Debezium Iceberg consumer is a very young project and looking for new maintainers. There are definitively many small/big improvements to do, including documentation, adding new features to submitting bug reports.
+Debezium Iceberg consumer is a very young project and looking for new maintainers. There are definitively many small/big
+improvements to do, including documentation, adding new features to submitting bug reports.
 
 Please feel free to send pull request, report bugs or open feature request.
 
 ## License
+
 By contributing, you agree that your contributions will be licensed under Apache 2.0 License.

README.md

@@ -18,7 +18,7 @@ For a full understanding of current limitations and recommended solutions, pleas
 
 # Installation
 - Requirements:
-  - JDK 11
+  - JDK 21
   - Maven
 ### Building from source code
 1. Clone the repository
@@ -43,7 +43,8 @@ bash run.sh
 
 It's possible to use python to run,operate debezium server
 
-This project provides Python scripts to automate the startup, shutdown, and configuration of Debezium Server. By leveraging Python, you can manage Debezium Server.
+For convenience this project additionally provides Python scripts to automate the startup, shutdown, and configuration of Debezium Server. 
+Using Python, you can do various Debezium Server operation and take programmatic, dynamic, debezium configuration.
 example:
 
 ```commandline
@@ -64,9 +65,18 @@ d.run(*java_args)
 ```
 
 ```python
+import os
 from debezium import DebeziumRunAsyn
 
 java_args = []
+# using python we can dynamically influence debezium 
+# by chaning its config within python
+if my_custom_condition_check is True:
+    # Option 1: set config using java arg
+    java_args.append("-Dsnapshot.mode=always")
+    # Option 2: set config using ENV variable
+    os.environ["SNAPSHOT_MODE"] = "always"
+
 java_args.append("-Dquarkus.log.file.enable=true")
 java_args.append("-Dquarkus.log.file.path=/logs/dbz_logfile.log")
 d = DebeziumRunAsyn(debezium_dir="/dbz/server/dir", java_home='/java/home/dir', java_args=java_args)