Include (or delete) pages listed as missing

Fix pages listed as missing when running docker compose up by (intelligently) deleting or including them

guidebook-1  | INFO    -  The following pages exist in the docs directory, but are not included in the "nav" configuration:
guidebook-1  |   - howtos/msteams-workflows-webhooks.md
guidebook-1  |   - reference/glossary.md
guidebook-1  |   - reference/tech-lead-forum.md
guidebook-1  |   - services/legacy-application-backups.md
guidebook-1  |   - services/service-template.md
guidebook-1  |   - services/temporary-employment-service.md
guidebook-1  |   - standards-and-compliance/index.md
guidebook-1  |   - standards-and-compliance/non-functional-requirements/apis.md
guidebook-1  |   - standards-and-compliance/non-functional-requirements/availability.md
guidebook-1  |   - standards-and-compliance/non-functional-requirements/gcp.md
guidebook-1  |   - standards-and-compliance/non-functional-requirements/ownership.md
guidebook-1  |   - standards-and-compliance/non-functional-requirements/security.md
guidebook-1  |   - standards-and-compliance/non-functional-requirements/template.md
guidebook-1  |   - standards-and-compliance/non-functional-requirements/user-concurrency.md