updated to Node v16

fixed Dockerfile build bug -- remove the line prompting for yes/no

added delete.sh and updated README.md

minor update with adding bin/ common utlity scripts.

minor update with adding bin/ common utlity scripts.

updated README.md

updated README.md

updated README.md

remove obmenu install due to google-chrome error and it is not used

update README.md to reflect the updates of OpenJDK v1.8.0_242