Add L15 slides

Author: iHiD

bootcamp_content/concepts/config.json

@@ -335,6 +335,13 @@
     "description": "Learn CSS's Grid layout system",
     "level": 14
   },
+  {
+    "slug": "css/positioning",
+    "parent": "CSS",
+    "title": "Positioning",
+    "description": "Learn about static, relative and absolute positioning",
+    "level": 15
+  },
   {
     "slug": "javascript/basics",
     "parent": "javascript",
@@ -397,5 +404,19 @@
     "title": "Conditionals",
     "description": "Learn how to use conditions in JavaScript",
     "level": 12
+  },
+  {
+    "slug": "javascript/intro-to-the-dom",
+    "parent": "javascript",
+    "title": "Intro to the DOM",
+    "description": "Learn about the DOM and style elements",
+    "level": 15
+  },
+  {
+    "slug": "javascript/game-loop",
+    "parent": "javascript",
+    "title": "The Game Loop",
+    "description": "Learn about the Game Loop and RequestAnimationFrame",
+    "level": 15
   }
 ]

bootcamp_content/concepts/css/positioning.md

@@ -0,0 +1,7 @@
+# Positioning
+
+<img src="https://assets.exercism.org/bootcamp/diagrams/css/positioning-1.png" class="diagram"/>
+<img src="https://assets.exercism.org/bootcamp/diagrams/css/positioning-2.png" class="diagram"/>
+<img src="https://assets.exercism.org/bootcamp/diagrams/css/positioning-3.png" class="diagram"/>
+<img src="https://assets.exercism.org/bootcamp/diagrams/css/positioning-4.png" class="diagram"/>
+<img src="https://assets.exercism.org/bootcamp/diagrams/css/positioning-5.png" class="diagram"/>

bootcamp_content/concepts/javascript/game-loop.md

@@ -0,0 +1,5 @@
+# Game Loop
+
+<img src="https://assets.exercism.org/bootcamp/diagrams/javascript/game-loop-1.png" class="diagram"/>
+<img src="https://assets.exercism.org/bootcamp/diagrams/javascript/game-loop-2.png" class="diagram"/>
+<img src="https://assets.exercism.org/bootcamp/diagrams/javascript/game-loop-3.png" class="diagram"/>

bootcamp_content/concepts/javascript/intro-to-the-dom.md

@@ -0,0 +1,7 @@
+# Intro to the DOM
+
+<img src="https://assets.exercism.org/bootcamp/diagrams/javascript/dom-1.png" class="diagram"/>
+<img src="https://assets.exercism.org/bootcamp/diagrams/javascript/dom-2.png" class="diagram"/>
+<img src="https://assets.exercism.org/bootcamp/diagrams/javascript/dom-3.png" class="diagram"/>
+<img src="https://assets.exercism.org/bootcamp/diagrams/javascript/dom-4.png" class="diagram"/>
+<img src="https://assets.exercism.org/bootcamp/diagrams/javascript/dom-5.png" class="diagram"/>