Don't use peertube logging if it's not installed

src/freedombone-app-peertube

@@ -271,11 +271,19 @@ function peertube_create_database {
 }
 
 function logging_on_peertube {
+    if [ ! -d $PEERTUBE_DIR ]; then
+        return
+    fi
+
     sed -i "s|level: '.*|level: 'debug' # debug/info/warning/error|g" "$PEERTUBE_DIR/config/production.yaml"
     systemctl restart peertube
 }
 
 function logging_off_peertube {
+    if [ ! -d $PEERTUBE_DIR ]; then
+        return
+    fi
+
     sed -i "s|level: '.*|level: 'error' # debug/info/warning/error|g" "$PEERTUBE_DIR/config/production.yaml"
     systemctl restart peertube
 }