fixes issues #2955 and #2959

[hangyakuzero]

Description

Recently @robkooper changed the way the docker install works so that pecan is reached from http://pecan.localhost/ instead of http://localhost:8000/. I've made the changes in the documentation in https://github.com/PecanProject/pecan/pull/2935, but there are still instances of "localhost:8000" in tests, shell scripts,etc. I have made the changes accordingly. Also I have changed the regex pattern as required.

this fixes issue #2955 and #2959

Review Time Estimate

• [ ] Immediately
• [x] Within one week
• [ ] When possible

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] My change requires a change to the documentation.
• [ ] My name is in the list of CITATION.cff
• [ ] I have updated the CHANGELOG.md.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.