Add documentation

References #14

app/scrapy.cfg

@@ -1,7 +1,13 @@
+# This is the scrapy.cfg file for the book_scraper project
+
+# The [settings] section specifies the default settings module for the project
 [settings]
+# The default key points to the settings module of the book_scraper project
 default = book_scraper.settings
 
+# The [deploy] section contains settings related to deploying the project to a Scrapyd server
 [deploy]
-# The url key is used when utilizing a Scrapyd server
+# The url key is used when utilizing a Scrapyd server. Uncomment and set the URL to point to your Scrapyd server
 # url = http://localhost:1337/
-project = book_scraper
+# The project key sets the name of the project
+# project = book_scraper