OAuth 2.0 flow using Keycloak with a back-end and front-end?

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                        ~~~~~~~~~~~~~~~~~~~~~~~~~~
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  <?xml version="1.0" encoding="UTF-8"?>
  <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
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      <welcome-file>default.htm</welcome-file>
    </welcome-file-list>
    <servlet>
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  <servlet-mapping>
  <servlet-name>Controller</servlet-name>
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  </web-app>
  

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