removed python2 from scripts and dockerfile

Dockerfile

@@ -34,17 +34,13 @@ RUN ./install-system.sh --no-flash
 RUN mv firefox-bin /opt/firefox-bin
 ENV FIREFOX_BINARY /opt/firefox-bin/firefox-bin
 
-# Instead of running install-pip-and-packages.sh, the packages are installed
-# manually using pip and pip3 so that python2 and python3 are supported in the
-# final image.
-RUN apt-get -y install python-pip python3-pip
-
 # For some reasons, python3-publicsuffix doesn't work with pip3 at the moment,
 # so install it from the ubuntu repository
 RUN apt-get -y install python3-publicsuffix
 
 COPY requirements.txt .
-RUN pip3 install -U -r requirements.txt
+COPY install-pip-and-packages.sh .
+RUN ./install-pip-and-packages.sh
 
 COPY --from=extension /usr/src/app/dist/openwpm-*.zip automation/Extension/firefox/openwpm.xpi
 
@@ -59,5 +55,5 @@ COPY . .
 # possible to run everything as root as well.
 RUN adduser --disabled-password --gecos "OpenWPM"  openwpm
 
-# Alternatively, python3 could be used here
+# Setting demo.py as the default command
 CMD python3 demo.py

install-dev.sh

@@ -2,4 +2,4 @@
 set -e
 
 # Dependencies for OpenWPM development -- NOT needed to run the platform.
-pip install --user -U -r requirements-dev.txt
+pip3 install --user -U -r requirements-dev.txt

install-system.sh

@@ -39,7 +39,7 @@ if [ "$flash" = true ]; then
 fi
 sudo apt-get update
 
-sudo apt-get install -y firefox htop git python-dev libxml2-dev libxslt-dev libffi-dev libssl-dev build-essential libboost-python-dev libleveldb-dev libjpeg-dev curl wget git bash vim
+sudo apt-get install -y firefox htop git libxml2-dev libxslt-dev libffi-dev libssl-dev build-essential libboost-python-dev libleveldb-dev libjpeg-dev curl wget git bash vim
 
 # For some versions of ubuntu, the package libleveldb1v5 isn't available. Use libleveldb1 instead.
 sudo apt-get install -y libleveldb1v5 || sudo apt-get install -y libleveldb1