docs: update readme

README.md

@@ -15,6 +15,10 @@ You can get a `JSON` list of articles by making a `GET` request to the `/article
 
 `GET (http|https)://YOUR_URL/articles`
 
+### Possible Responses
+
+#### 200 -
+
 ## POST an article
 
 You can add an article by providing the article's url in the body of a `POST` request:
@@ -26,11 +30,11 @@ You can add an article by providing the article's url in the body of a `POST` re
 ```json
 {
 	// required
-	"url": "ARTICLE_URL",
+	"url": "https://dev.to/jacobshuman/wtf-is-a-github-profile-readmemd-1p8c",
 
 	// optional
 	"title": "WTF is a GitHub Profile README.md",
-	"description": "",
+	"description": "What is a profile README and why would I want one?",
 	"author": "Jacob Shuman",
 	"content": "",
 	"date": ""
@@ -47,6 +51,31 @@ Article was added to the SQLite database successfully.
 
 The url was not found in the body of the request.
 
-#### Unable to extract metadata at url (400)
+#### 400 - Unable to extract metadata at url
 
 There was an issue extracting the article metadata automatically. The article was **not** added to the SQLite database.
+
+## Endpoints
+
+### /rss (GET)
+Content-Type - application/xml+rss
+
+aliases
+- /rss.xml
+- /feed
+- /feed.xml
+
+#### Possible Responses
+
+##### 200
+
+##### 400
+
+### /atom (GET
+
+### /json (GET)
+
+### /articles (GET)
+Returns a JSON array of all articles in your reading list. Objects are FeedItems.
+
+### /articles/add (POST)