docs(migration): explain how to use migrations (#8319)

* docs(migration): explain how to use migrations

* docs(migration): storage, .sequelizerc

* docs(migrations): dynamic config, storage, ssl, url option, using env varibales

* docs(migrations): seeds and production tips

* docs: simplify queryInterface intro

* docs: QueryInterface API + seeding docs + styling

* docs: expose describe table to public

docs/css/theme.css

@@ -15,10 +15,16 @@
   color: #ffffff;
 }
 
-.manual-toc-root ul li a {
+.manual-toc-root ul li {
+  margin-top: 0.5em;
+  margin-bottom: 0.5em;
   font-weight: normal !important;
 }
 
+.manual-toc .indent-h1 {
+  margin: 0.5em 0 0 .5em;
+}
+
 /* Class Summay*/
 .summary thead tr {
   background-color: #074278;

lib/utils.js

@@ -441,6 +441,10 @@ exports.removeTicks = removeTicks;
  *    address.coordinates.latitude: 55.6779627,
  *    address.coordinates.longitude: 12.5964313
  *  }
+ *
+ * @param value, an Object
+ * @return Object, an flattened object
+ * @private
  */
 function flattenObjectDeep(value) {
   if (!_.isPlainObject(value)) return value;