trying to get rid of segfault, changing to ubuntu

Dockerfile

@@ -12,6 +12,7 @@ RUN apt-get update && apt-get upgrade -y
 
 # install required packages
 RUN DEBIAN_FRONTEND="noninteractive" apt-get install -y apache2 apache2-utils libapache2-mod-svn subversion 
+RUN DEBIAN_FRONTEND="noninteractive" apt-get install -y vim curl lsof
 
 # add svn configuration
 ADD dav_svn.conf /etc/apache2/sites-enabled/dav_svn.conf
@@ -24,7 +25,7 @@ RUN mkdir /var/lib/dav/
 #RUN sed -i.bak -r 's/(User|Group) apache/\1 deploy/' /etc/apache2/apache2.conf
 RUN sed -i.bak 's/#ServerName www.example.com:80/ServerName svn.cpi.imtek.uni-freiburg.de:80/' /etc/apache2/apache2.conf
 RUN sed -i.bak 's/LogLevel warn/LogLevel debug/' /etc/apache2/apache2.conf
-RUN sed -i.bak 's/Listen 80/Listen 80\nListen 8000/' /etc/apache2/apache2.conf
+RUN sed -i.bak 's/Listen 80/Listen 80\nListen 8000/' /etc/apache2/ports.conf
 #RUN sed -i.bak 's/#LoadModule deflate_module/LoadModule deflate_module/' /etc/apache2/apache2.conf
 #RUN sed -i.bak 's/#LoadModule logio_module/LoadModule logio_module/' /etc/apache2/apache2.conf