Added forwarded header filter as bean

module-server/src/main/kotlin/de/twomartens/wahlrecht/configuration/FilterConfiguration.kt

@@ -0,0 +1,13 @@
+package de.twomartens.wahlrecht.configuration
+
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+import org.springframework.web.filter.ForwardedHeaderFilter
+
+@Configuration
+open class FilterConfiguration {
+  @Bean
+  open fun forwardedFilter(): ForwardedHeaderFilter {
+    return ForwardedHeaderFilter()
+  }
+}

module-server/src/main/kotlin/de/twomartens/wahlrecht/configuration/InterceptorConfiguration.kt

@@ -8,13 +8,13 @@ import java.time.Clock
 
 @Configuration
 open class InterceptorConfiguration {
-    @Bean
-    open fun loggingInterceptorRest(clock: Clock): LoggingInterceptorRest {
-        return LoggingInterceptorRest(clock)
-    }
+  @Bean
+  open fun loggingInterceptorRest(clock: Clock): LoggingInterceptorRest {
+    return LoggingInterceptorRest(clock)
+  }
 
-    @Bean
-    open fun headerInterceptorRest(): HeaderInterceptorRest {
-        return HeaderInterceptorRest()
-    }
+  @Bean
+  open fun headerInterceptorRest(): HeaderInterceptorRest {
+    return HeaderInterceptorRest()
+  }
 }

module-server/src/main/resources/application.yaml

@@ -1,7 +1,7 @@
 server:
   port: 12000
   shutdown: graceful
-  forward-headers-strategy: native
+  forward-headers-strategy: framework
 
 ### technical configurations ###
 management: