add migrate to teku page (#344)

* add migrate to teku page

* Add checkpoint start and some other links

* minor edits

* fix links

Co-authored-by: Ben Edgington <[email protected]>

Author: alexandratran

docs/HowTo/Get-Started/Migrate-to-Teku.md

@@ -0,0 +1,17 @@
+---
+description: Migrate to Teku guide
+---
+
+# Migrate to Teku
+
+Migrate from a different Ethereum consensus client to Teku to contribute to [client diversity](https://clientdiversity.org/).
+
+When migrating from a different client, consider the following:
+
+- You can [import a slashing protection database](../../Reference/CLI/Subcommands/Slashing-Protection.md#import).
+- You might need to update your [network ports](../Find-and-Connect/Improve-Connectivity.md).
+- The way Teku handles [validator keys](../../Reference/CLI/CLI-Syntax.md#validator-keys) might differ from your previous client.
+  Teku also supports [using Web3Signer](../External-Signer/Use-External-Signer.md).
+- You can skip the long initial sync period by using Teku's [checkpoint start](../Get-Started/Checkpoint-Start.md) capability.
+
+Find guides to switch from specific clients on the [client diversity website](https://clientdiversity.org/#switch).

mkdocs.yml

@@ -63,6 +63,7 @@ nav:
                 - Connect to Mainnet: HowTo/Get-Started/Connect/Connect-To-Mainnet.md
                 - Connect to a testnet: HowTo/Get-Started/Connect/Connect-To-Testnet.md
             - Start Teku from a recent state: HowTo/Get-Started/Checkpoint-Start.md
+            - Migrate to Teku: HowTo/Get-Started/Migrate-to-Teku.md
         - External signing:
               - Use an external signer: HowTo/External-Signer/Use-External-Signer.md
         - Load validators without restarting: HowTo/Load-Validators-No-Restart.md