Create upgrade-to-v2.1.0.md

docs/docs/self-host/guides/upgrade-to-v2.1.0.md

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+---
+title: How to upgrade self-hosted OpenSign to v2.1.0?
+---
+# Steps to upgrade any previous self-hosted OpenSign to v2.1.0
+
+For self-hosted deployments, version 2.1.0 introduces changes to the signup process:
+
+**New Deployment:** The signup button has been removed. During a fresh deployment, an admin creation wizard will guide you through creating an Admin user.
+
+**Migration from Previous Versions:** For those upgrading from any previous version to 2.1.0, follow these steps to promote an existing user to Admin:
+
+After upgrading, visit "https://public_url/upgrade-2.1" and enter the requested details to change the role of an existing user to Admin.
+Ensure you have your master key (set in the environment variable during installation) and the email ID of the user to be promoted ready.
+
+**User Roles and Capabilities**
+In the self-hosted version, Admins have comprehensive control:
+
+Admin: Admins can manage users and share templates with the entire organization. Only Admins can create users, with roles being assigned as OrgAdmin, Editor, or User.
+OrgAdmin: OrgAdmins have the same access as Admins. Essentially they are new admins that can be created as and when needed.
+Editor: Editors can share templates with all users but cannot create users.
+User: Users cannot share templates or create users. They can only create emplates for themselves.
+All other features remain accessible to all roles.