nested doc update

Author: erikhatcher

docs/30_Index_configuration/4_nested_docs.mdx

@@ -8,9 +8,21 @@ There are two distinct ways to map and index the contents of nested documents.
 
 Default dynamic mapping behavior, flattens nested documents into “arrays” of values on main document.
 
+![flattened document](/img/flattened_document.png)
+
+
 ## `embeddedDocuments`
 
 Attribute pattern `elemMatch`-like matching, more nuanced and expensive than document type flattening.
 See also: https://www.mongodb.com/docs/atlas/atlas-search/field-types/embedded-documents-type/
 
 WARNING: Each nested document mapped as as `embeddedDocuments` counts as an additional "index object".
+
+```
+"children": {
+  "type": "embeddedDocuments",
+  "dynamic": true
+}
+```
+
+![embeddedDocuments](/img/embedded_documents.png)

docs/70_Data_Modeling/index.mdx

@@ -1,4 +1,6 @@
 # Data Modeling for Search
 
+https://www.mongodb.com/developer/products/atlas/data-modeling-for-search/
+
 * Labs: movies search searching for movies, versus searching for cast members
 * Tips: $merge