Prepare for release v0.2.2

wiki/install.md

@@ -10,3 +10,8 @@ Please note that the server binary (available in [libmutton releases](https://gi
 After placing the binaries in your $PATH, it is highly recommended to also download and correctly place/source the relevant [shell completions scripts](https://github.com/rwinkhart/MUTN/blob/main/wiki/completions.md).
 
 Please see the [usage guide](https://github.com/rwinkhart/MUTN/blob/main/wiki/usage.md) for help getting started.
+
+### Dependencies (required for all installations)
+- GnuPG command-line utility (`gpg` command; will not be required in the future) for encryption/decryption
+- A text editor (preferably CLI-based) for writing entry notes
+- A private key for SSH key-based authentication is required to use MUTN/libmutton in online/synced mode