Create courses.md

Author: shannona

_pages/courses.md

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+---
+cover: false
+header:
+  overlay_color: "#000"
+  overlay_filter: "0.25"
+  overlay_image: /assets/images/dev-arch-background.jpg
+  og_image: /assets/images/bc-card.jpg
+title: Developer Courses
+hide_description: true
+classes:
+  - wide
+permalink: /courses/
+sidebar:
+  nav: courses
+---
+
+Blockchain Commons creates courses for developers and for users, intended to bring new programmers into the industry and to support the use of best practices.
+
+## Learning Bitcoin from the Command Line
+
+<a href="https://github.com/BlockchainCommons/Learning-Bitcoin-from-the-Command-Line/blob/master/README.md"><img src="https://www.blockchaincommons.com/images/projects/lbtc-screen.png" style="float: left; border: 1px solid white; width: 400px"></a>
+
+## Learning FROST from the Command Line
+
+## Smart Custody
+