Changes Python installation + script to Python 3

Dockerfile

@@ -18,20 +18,20 @@ RUN sudo locale-gen en_US.UTF-8
 ENV LANG=en_US.UTF-8 LANGUAGE=en_US:en LC_ALL=en_US.UTF-8
 
 # Install specific packages
-RUN sudo apt-get install -y getmail6 python2
+RUN sudo apt-get install -y getmail6 python3
 RUN sudo git clone https://github.com/ralbear/IMAPbackup.git
 
 # Remove apt lists (for storage efficiency)
 RUN sudo rm -rf /var/lib/apt/lists/*
 
 # Run list command
-# RUN cd IMAPbackup && sudo python imapgrab.py -l -s $MAILHOST -u $MAILUSER -p $MAILPASSWORD
+# RUN cd IMAPbackup && sudo python3 imapgrab38.py -l -s $MAILHOST -u $MAILUSER -p $MAILPASSWORD
 
 # Assuming that folder is mount to /mnt, create mail-output folder
 RUN sudo mkdir -p /mnt/mail
 
 # Check if logging is enabled
 CMD if [ "${MAILLOG}" = "TRUE" ]; \
-    then sudo mkdir -p /mnt/log && cd IMAPbackup && sudo python2 imapgrab.py -L imapgrab -d -v -M -f /mnt/mail/$MAILFOLDER -s $MAILHOST -u $MAILUSER -p $MAILPASSWORD -m "_ALL_" >> /mnt/log/$(date +'%Y-%m-%d_%H-%M-%S')_mail-backup.log; \
-    else cd IMAPbackup && sudo python2 imapgrab.py -L imapgrab -d -v -M -f /mnt/mail/$MAILFOLDER -s $MAILHOST -u $MAILUSER -p $MAILPASSWORD -m "_ALL_"; \
+    then sudo mkdir -p /mnt/log && cd IMAPbackup && sudo python3 imapgrab38.py -L imapgrab -d -v -M -f /mnt/mail/$MAILFOLDER -s $MAILHOST -u $MAILUSER -p $MAILPASSWORD -m "_ALL_" >> /mnt/log/$(date +'%Y-%m-%d_%H-%M-%S')_mail-backup.log; \
+    else cd IMAPbackup && sudo python3 imapgrab38.py -L imapgrab -d -v -M -f /mnt/mail/$MAILFOLDER -s $MAILHOST -u $MAILUSER -p $MAILPASSWORD -m "_ALL_"; \
     fi