Add a lock file to the pleroma blocking script

src/freedombone-app-pleroma

     echo "if [ ! -f /root/${PROJECT_NAME}-firewall-domains.cfg ]; then" >> $blocking_script_file
     echo '    exit 0' >> $blocking_script_file
     echo 'fi' >> $blocking_script_file
+    echo 'if [ -f /tmp/pleroma-blocking.lock ]; then' >> $blocking_script_file
+    echo '    exit 0' >> $blocking_script_file
+    echo 'fi' >> $blocking_script_file
+    echo 'touch /tmp/pleroma-blocking.lock' >> $blocking_script_file
     echo 'cd /etc/postgresql' >> $blocking_script_file
     echo 'while read blocked; do' >> $blocking_script_file
     echo '    if [[ "$blocked" == *"."* || "$blocked" == *"@"* ]]; then' >> $blocking_script_file
     echo '        fi' >> $blocking_script_file
     echo '    fi' >> $blocking_script_file
     echo "done </root/${PROJECT_NAME}-firewall-domains.cfg" >> $blocking_script_file
+    echo 'rm /tmp/pleroma-blocking.lock' >> $blocking_script_file
     chmod +x $blocking_script_file
 
     if ! grep -q "$blocking_script_file" /etc/crontab; then