No logging by default

src/freedombone-app-matrix

         -v TURNSHAREDSECRET="turn_shared_secret: \"${turnkey}\"" \
         -v PIDFILE="pid_file: ${MATRIX_DATA_DIR}/homeserver.pid" \
         -v DATABASE="database: \"${MATRIX_DATA_DIR}/homeserver.db\"" \
-        -v LOGFILE="log_file: \"${MATRIX_DATA_DIR}/homeserver.log\"" \
+        -v LOGFILE="log_file: \"/dev/null\"" \
         -v MEDIASTORE="media_store_path: \"${MATRIX_DATA_DIR}/media_store\"" \
         '{
         sub(/turn_shared_secret: "YOUR_SHARED_SECRET"/, TURNSHAREDSECRET);