Description 

Create a new example program that illustrates custom env variables - with a Java app that needs a JDBC connection string.

Once the example is created and documented in its README, we can write our first blog post to introduce the Service Binding Operator to prospective users through the patterns shown in its examples.

Acceptance Criteria

• The example must be written, verified, and documented in a README
• The example must be added into the "/examples" directory