Updated API Setup (markdown)

API-Setup.md

@@ -1 +1,39 @@
-Setup api
+# Setup
+
+This API is only used for the initial setup.
+
+## Get list of users
+`POST /setup`
+
+```json
+{
+  "db": {
+    "host": "localhost",
+    "user": "pdns",
+    "password": "pdns",
+    "database": "localhost",
+    "port": 3306
+  },
+  "admin": {
+    "name": "initaladmin",
+    "password: "foo"
+  }
+}
+```
+
+### Response
+| code | result |
+| --- | --- |
+| 204 | Everything was successful the answer is therefore empty |
+| 400 | The supplied body was empty |
+| 404 | If the application has already been setup |
+| 422 | One of the required fields is missing |
+| 500 | Error on setup, message in data! |
+
+If an error occurred a message is returned.
+
+```json
+{
+  "error": "Error message!"
+}
+```