Updates for the Spring Boot application for Tomcat

[sadukie]

Purpose

• Adds tomcat branch for the Azure App Service - Java quickstart - Tomcat instructions
• Note: This is tested and successfully runs on Azure App Service using Java 11, Tomcat 8.5 and Tomcat 9.0, Linux and Windows.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Fork the code.
• Switch to the tomcat branch.
• Create an Azure App Service app with the following settings:
  • Runtime: Java 11
  • Java web server stack: Tomcat 8.5 or Tomcat 9.0
  • Operating System: Windows or Linux
  • On the Deployment tab, set up GitHub integration to pull from your fork, specifically the tomcat branch.
  • Wait a bit for the deployment. (Or go to the Deployment Center > Logs to watch the deployment progress.)
  • Once deployed, you should see "Hello World!"

What to Check

Verify that the following are valid

• pom.xml file changes:
  • Packaging as a WAR file
  • Tomcat dependency is included and marked as provided
  • finalName is set to ROOT to be able to see the app at the root URL rather than a subfolder
• DemoApplication.java extends the SpringBootServletInitializer class

Other Information

• This does not work with Tomcat 10.0 regardless of operating system.