bugfixing to run command as user deploy

Dockerfile

@@ -63,4 +63,13 @@ RUN pip install git+https://git.cpi.imtek.uni-freiburg.de/CPI/elab-users.git
 WORKDIR /data
 
 # Start httpd as root, but will switch to deploy user thanks to env variable
-CMD ["sudo", "--preserve-env", "httpd-foreground"]
+CMD [
+    "sudo", 
+    "APACHE_PID_FILE=/var/run/apache2/apache2.pid" , 
+    "APACHE_LOCK_DIR=/var/lock/apache2", 
+    "APACHE_LOG_DIR=/var/log/apache2",
+    "APACHE_RUN_DIR=/var/run/apache2",
+    "APACHE_RUN_USER=deploy",
+    "APACHE_RUN_GROUP=deploy",
+    "httpd-foreground"
+    ]