Upgrade Debian integration

docs/install/debian.md

@@ -79,5 +79,13 @@ sudo systemctl start gancio
 sudo yarn global remove gancio
 sudo yarn cache clean
 sudo yarn global add --silent {{site.url}}/latest.tgz
+  if the ESOCKETTIMEDOUT error occurred, run the following command  
+    sudo yarn config set network-timeout 300000
+  then re-run the command
+    sudo yarn global add --silent {{site.url}}/latest.tgz
 sudo systemctl restart gancio
+  if the 502 Bad Gataway error occurred, run the following command
+    sudo systemctl reload nginx
+  then re-run the command
+    sudo systemctl restart gancio
 ```