added source file with updated icons

public/icons/docs/mocha/SOURCE

@@ -0,0 +1,2 @@
+https://mochajs.org/
+https://github.com/mochajs/mocha/tree/master/assets

public/icons/docs/pygame/SOURCE

@@ -0,0 +1 @@
+https://www.pygame.org/news/2020/10/pygame-20th-birthday

public/icons/docs/sqlite/SOURCE

@@ -0,0 +1 @@
+https://commons.wikimedia.org/wiki/File:SQLite370.svg

public/icons/docs/terraform/SOURCE

@@ -0,0 +1 @@
+https://www.hashicorp.com/brand