Start container with required environment variables to test connectivity.
docker build --tag oracleconnectivity:1.0 .
docker run -e ORACLE_URL="jdbc:oracle:thin:@oracle:1521/XE" \
-e ORACLE_USER=user \
-e ORACLE_PASSWORD=password \
-e ORACLE_DRIVER="oracle.jdbc.OracleDriver" \
-e ORACLE_SQL="select * from user_objects" \
oracleconnectivity:1.0