Use python 3

src/freedombone-app-microblogpub

 MICROBLOGPUB_CODE=
 MICROBLOGPUB_ONION_PORT=9261
 MICROBLOGPUB_REPO="https://github.com/tsileo/microblog.pub"
-MICROBLOGPUB_COMMIT='848b8b23a8765d86bab2830c8d65d6b37337d03b'
+MICROBLOGPUB_COMMIT='791e55c7f5eee26792b90b94668d5f0dbbc767f9'
 MICROBLOGPUB_PORT_INTERNAL=5005
 
 # These parameters are used by the FreedomBox mobile app
 }
 
 function install_microblogpub {
+    apt-get -yq install python3-pip python3-flask
+
     install_mongodb
 
     if [ ! "$MICROBLOGPUB_DOMAIN_NAME" ]; then
     git checkout "$MICROBLOGPUB_COMMIT" -b "$MICROBLOGPUB_COMMIT"
     set_completion_param "microblogpub commit" "$MICROBLOGPUB_COMMIT"
 
-    pip install -r requirements.txt
+    pip3 install -r requirements.txt
 
     { echo 'import sass';
       echo "sass.compile(dirname=('sass', 'static/css'), output_style='compressed')"; } > generate_css.py
-    python generate_css.py
+    python3 generate_css.py
 
     { echo "username: '$MY_USERNAME'";
       echo "name: '$MY_NAME'";