Working prototype

This commit implements the oidc compatibility with the caveat of having
every subsite under the app path. For that, there is also a redirection
handler to redirect the home page to the app home page.

pom.xml

@@ -38,6 +38,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-jpa</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
         <dependency>
             <groupId>com.vaadin</groupId>
             <artifactId>vaadin-spring-boot-starter</artifactId>
@@ -72,11 +76,6 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-oauth2-client</artifactId>
         </dependency>
-        <dependency>
-            <groupId>io.github.cdimascio</groupId>
-            <artifactId>dotenv-java</artifactId>
-            <version>3.0.0</version>
-        </dependency>
     </dependencies>
     <dependencyManagement>
         <dependencies>