Adds tutorial introudction page

Author: Conor Okus

docs/.vuepress/config.js

@@ -90,6 +90,13 @@ const tutorialSidebar = [
     collapsable: false,
     children: [
       '/tutorials/getting-started',
+      {
+        title: 'Building a node with LDK',
+        collapsable: false,
+        children: [
+          ['/tutorials/building-a-node-with-ldk/introduction', 'Introduction']
+        ]
+      },
       '/tutorials/build_a_node_in_java',
       '/tutorials/build_a_node_in_rust'
     ],

docs/tutorials/building-a-node-with-ldk/introduction.md

@@ -0,0 +1,31 @@
+# Building a Node with LDK
+
+## Learn how to build a basic LDK node from scratch using LDK 
+
+The following tutorials will show you how to build the simplest lightning node using LDK, that fufills the following tasks:
+
+1. **Connect to peers** 
+2. **Open channels** 
+3. **Send Payments** 
+4. **Receive Payments**
+5. **Close channels**
+
+### Foundational Components
+
+Let's start by looking at the core components we'll need to make this node work for the tasks we outlined above.
+
+1. A Peer Manager, for establishing TCP/IP connections to other nodes on the lightning network.
+2. A Channel Manager, to open and close channels.
+3. Payments & Routing, ability to create and pay invoices.
+
+To make the above work we also need a series of supporting modules, including:
+ - A Fee Estimator 
+ - A Logger 
+ - A Transaction Broadcaster 
+ - A Network Graph 
+ - A Persister
+ - An Event Handler 
+ - A Transaction Filter 
+ - A Chain Monitor 
+ - A Keys Manager 
+ - A Scorer