add(docs) created 2 new pages for the tutorial (managing multiple nodes and using env command

Author: CryptoTotalWar

docs/tutorials/polykey-cli/managing-multiple-nodes.md

@@ -0,0 +1 @@
+# Managing Multiple Nodes

docs/tutorials/polykey-cli/using-environment-variables.md

@@ -0,0 +1 @@
+# Using Environment Variables

sidebars.ts

@@ -23,9 +23,11 @@ const sidebars: SidebarsConfig = {
             'tutorials/polykey-cli/bootstrapping',
             'tutorials/polykey-cli/managing-vaults',
             'tutorials/polykey-cli/managing-secrets',
+            'tutorials/polykey-cli/using-environment-variables',
             'tutorials/polykey-cli/claiming-digital-identities',
             'tutorials/polykey-cli/discovering-other-users',
             'tutorials/polykey-cli/sharing-vaults',
+            'tutorials/polykey-cli/managing-multiple-nodes',
           ],
         },
         {