chore: install mycli on the prod server

See https://github.com/dbcli/mycli

[skip ci]

Author: php-coder

infra/vagrant/provisioning/prod.yml

@@ -15,6 +15,11 @@
       package: nano
       state: absent
 
+  - name: Installing mycli
+    apt:
+      package: mycli
+      state: present
+
   - name: Creating /data directory
     file:
       path: /data