Contentful docs update

Author: kkartunov

docs/contentful/index.md

@@ -12,3 +12,4 @@ For introduction into Contentful-related development look into
 ### End-User Documentation
 
 - [Custom inline components in Markdown fields](./custom-inline-components-in-markdown-fields.md)
+- [Miscellaneous CSS Solutions](./miscellaneous-CSS-solutions.md)

docs/contentful/miscellaneous-CSS-solutions.md

@@ -0,0 +1,23 @@
+# Miscellaneous CSS Solutions
+
+## Align Button To Bottom of Cards
+Example: https://community-app.topcoder.com/examples/contentful/viewport/4fr7QZfF2qh9PWEhtBmOZ3
+
+The containing viewport uses `Row with Max-Width` theme. Each `contentBlocks` inside it are extended with following CSS: 
+
+Content-Wrapper
+```
+{
+    "height": "100%"
+}
+```
+
+Content
+```
+{
+    "display": "flex",
+    "flex-direction": "column",
+    "justify-content": "space-between",
+    "flex": "auto"
+}
+```