Updated configuration and dockerfile.

docker/Dockerfile

@@ -3,5 +3,5 @@ FROM openjdk:13-jdk-alpine
 RUN echo "jenkins:x:2030:100:guest:/home/jenkins:/sbin/nologin" >> /etc/passwd && \
     mkdir /home/jenkins && chmod 777 /home/jenkins && \ 
     apk update && \
-    apk add git openssh zip R bash curl python3
+    apk add git openssh zip R bash curl python3 py3-pip
 

frameworks/Kieker/python/config.rc

@@ -3,6 +3,10 @@
 PYTHON=`which python3`
 
 PIP=`which pip`
+if [ ! -f "$PIP" ] ; then
+	PIP=`which pip3`
+fi
+
 GIT=`which git`
 
 RSCRIPT_PATH="${BASE_DIR}/../../statistics.r"