refactor: add id to readme markdown container and style images for responsiveness

Author: Yehonal

src/app/repo-details/repo-details.component.html

@@ -17,7 +17,7 @@ <h2 class="mt-0 mb-0">{{ data.repo.name }}</h2>
   </div>
 
   <div class="row">
-    <div class="col-12 col-md-8">
+    <div id="readme-markdown" class="col-12 col-md-8">
       <markdown>
         {{ data.readme | emojiFixup }}
       </markdown>

src/app/repo-details/repo-details.component.scss

@@ -8,3 +8,7 @@
   border: solid 2px #888;
   padding: 25px;
 }
+
+#readme-markdown img {
+  max-width: 100%;
+}