diff --git a/docker/backend/Dockerfile b/docker/backend/Dockerfile
index 419a9cf5c..721c0287f 100644
--- a/docker/backend/Dockerfile
+++ b/docker/backend/Dockerfile
@@ -2,6 +2,9 @@ FROM devfra.azurecr.io/de.fraport.build/tools:1.1.0
 
 # debug info
 RUN lsb_release -a
+RUN curl -k https://google.de
+RUN env
+RUN curl -sSLk -x $HTTP_PROXY
 
 RUN apt-get -y update && apt-get -y install inotify-tools
 RUN apt-get -y update && apt-get -y install haskell-stack git