set internal vault uri correctly

[kspearrin]

Type of change

- [x] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other

Objective

Resolves #2530

Set internal vault URI env variable dynamically.

Code changes

• Dockerfile: Change default value to 8080 port.
• entrypoint.sh: Set internal vault uri based on port env variables and SSL settings.

Before you submit

• Please check for formatting errors (dotnet format --verify-no-changes) (required)
• If making database changes - make sure you also update Entity Framework queries and/or migrations
• Please add unit tests where it makes sense to do so (encouraged but not required)
• If this change requires a documentation update - notify the documentation team
• If this change has particular deployment requirements - notify the DevOps team

[kspearrin]

Nice catch