docs(migrate-to-new-server.md): add migration instructions for plane.…

…so deployment

A new documentation file has been created to provide step-by-step instructions for migrating the plane.so deployment to a new server. This includes commands for creating a database dump, transferring the dump between servers, and restoring the database on the new server. The documentation ensures that the migration process is repeatable and reduces the risk of errors during the transition.

plane/migrate-to-new-server.md

@@ -0,0 +1,22 @@
+# Migrate plane.so deployment to a new server
+
+Create a database dump
+
+    docker exec -e PGPASSWORD=[postgres-password] -t plane-app-plane-db-1 pg_dumpall -c -U plane > dump_$(date +%d-%m-%Y"_"%H_%M_%S).sql
+
+Copy from old server to local
+
+    scp [old-server-url]:/home/ubuntu/plane-selfhost/plane-app/dump_08-05-2024_06_48_21.sql plane_aws_dump_08-05-2024_06_48_21.sql  
+
+Copy from local to new server
+
+    scp plane_aws_dump_08-05-2024_06_48_21.sql [new-server-url]:/root/backups/plane_aws_dump_08-05-2024_06_48_21.sql
+
+Delete and Create Database
+    docker compose exec plane-db bash
+    dropdb plane -U plane
+    createdb plane -U plane
+
+Restore the database dump
+
+    cat plane_aws_dump_08-05-2024_06_48_21.sql | docker exec -e PGPASSWORD=[postgres-password] -i plane-app-plane-db-1 psql -U plane