Add `java.net.http` to the Dockerfile

[robotdan]

Issue:

• https://github.com/FusionAuth/fusionauth-issues/issues/2726

Problem:

A change to prime-mvc now requires the java.net.http module.

Solution:

1. Add java.net.http in support of new version of prime-mvc.
2. Correct case on 'as' to 'AS' per Docker build warning.

Related PR:

• https://github.com/FusionAuth/fusionauth-app/pull/493

Linked PRs:

• https://github.com/prime-framework/prime-mvc/pull/48
• https://github.com/CleanSpeak/cleanspeak-containers/pull/4/files
• https://github.com/CleanSpeak/cleanspeak-app/pull/6/files#diff-6ef52ae3e926ea992c266bfce3c3fe4881594f5293effab85304173bd0ae65b9
• https://github.com/FusionAuth/fusionauth-developer/pull/22