Make bootstrap script clean up after itself in case of errors

hack/bootstrap_tfw_dev.sh

@@ -12,7 +12,8 @@ LOGFILE=/tmp/bootstrap_tfw.log
 
 showlog() { echo && echo "Error! Showing logs:" && cat $LOGFILE; }
 cleanlog() { rm $LOGFILE; }
-trap showlog ERR
+err_cleanup() { rm -rf "$BASEIMAGE" "$FRONTEND" "$TEST"; }
+trap 'err_cleanup; showlog' ERR
 trap cleanlog EXIT
 
 : > $LOGFILE
@@ -23,7 +24,7 @@ echo -n "test... " && git clone git@github.com:avatao-content/${TEST}.git >> $LO
 echo "Done!"
 
 echo -n "Installing frontend dependencies... "
-cd ${FRONTEND}
+cd "$FRONTEND"
 yarn install >> $LOGFILE 2>&1
 cd ..
 echo "Done!"