Fix the Docker stage names and redirect address on the run-locally pages #97

Two copy-paste bugs on every "Run it locally" page: docker build --target coverage fails because the stage is called results, and the test stage records the exit code in out/exit-code instead of failing the build, so a pipeline built on it stays green when tests fail. The dotnet run paragraph also listed the HTTPS address twice.

Phase 1: Fix the pages

• Use the results stage name and explain out/exit-code
• Name the HTTP address that redirects

Checks: the site builds. Site PR LeanMeanCleanApps/leanmeancleanapps.github.io#31.