add umbrel migration guide

README.md

@@ -5,6 +5,7 @@ Bitcoin Knots
 ---
 
 - [datacarrier](page/datacarrier.md)
+- [Migration Core -> Knots on umbrel](/page/migrationumbrel.md)
 
 DATUM
 ---

page/migrationumbrel.md

@@ -0,0 +1,46 @@
+How to migrate from Core to Knots on Umbrel.
+=============
+
+This guide work for version of umbrel above 1.0!
+
+1. Install Bitcoin Knots if its not already done!
+2. Right click on Bitcoin Knots and click on stop.
+3. Do the same with Bitcoin Core (also stop all applications than depend on Bitcoin)
+
+<img src="migration/1-migration.png" width="50%" height="50%" />
+
+4. Now we need to open the terminal:
+
+Go to settings, click on the open button on the advanced settings section:
+
+<img src="migration/2-migration.png" width="50%" height="50%" />
+
+Click on the open button of the terminal:
+
+<img src="migration/3-migration.png" width="50%" height="50%" />
+
+Finaly open the "umbrelOS" terminal:
+
+<img src="migration/4-migration.png" width="50%" height="50%" />
+
+5. Type this command to erase the all Bitcoin Knots data:
+
+```bash
+cd umbrel/app-data/
+```
+
+```bash
+sudo rm -rf bitcoin-knots/data/ && sudo mv bitcoin/data/ bitcoin-knots/
+```
+
+6. you can now close the terminal and get back to the main view.
+7. Start Bitcoin Knots and see if the chain is synced!
+8. Swap all app that require Bitcoin to Bitcoin Knots.
+
+<img src="migration/5-migration.png" width="50%" height="50%" />
+
+<img src="migration/6-migration.png" width="50%" height="50%" />
+
+9. You can now uninstall Bitcoin Core.
+
+Done! You now have migrated to Bitcoin Knots.