Update swagger for json login, api prefix, direct upload, markdown read

public/swagger/v1/users/register.yaml

@@ -5,16 +5,10 @@ paths:
     - users
     requestBody:
       content:
+        application/json:
+          $ref: "#/components/schemas/requestRegister"
         application/x-www-form-urlencoded:
-          schema:
-            type: object
-            properties:
-              DnDex-User:
-                type: string
-                example: "namespace"
-              DnDex-Auth:
-                type: string
-                example: "password"
+          $ref: "#/components/schemas/requestRegister"
     responses:
       200:
         $ref: "#/components/schemas/responseOK"
@@ -23,3 +17,13 @@ components:
   schemas:
     responseOK:
       $ref: "../swagger.yaml#/components/schemas/responseOK"
+    requestRegister:
+      schema:
+        type: object
+        properties:
+          DnDex-User:
+            type: string
+            example: "namespace"
+          DnDex-Auth:
+            type: string
+            example: "password"