Added forwarded header filter as bean

.drone.yml

@@ -80,12 +80,6 @@ steps:
       - chmod 600 $HOME/.ssh/known_hosts
       - ssh-keyscan -H git.2martens.de > $HOME/.ssh/known_hosts 2>/dev/null
       - ./gradlew -Prelease.useLastTag=true final jib
-  - name: promote-staging
-    image: danihodovic/drone-promote
-    settings:
-      drone_token:
-        from_secret: drone_token
-      target: production
 
 volumes:
   - name: cache

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/resources/application.yaml

@@ -1,6 +1,7 @@
 server:
   port: 12000
   shutdown: graceful
+  forward-headers-strategy: framework
 
 ### technical configurations ###
 management: