Update documentation, update screenshot

docker-compose.yml

@@ -1,8 +0,0 @@
-mongodb:
-  image: mongo:latest
-  command: mongod --smallfiles --directoryperdb --noprealloc
-  hostname: mongodb
-  volumes:
-    - /tmp/mongodb:/data/db
-  expose:
-    - 27017

swagger.yml

@@ -192,6 +192,18 @@ definitions:
         type: string
       description:
         type: string
+  InfoType:
+    type: object
+    properties:
+      version:
+        type: string
+      updateBody:
+        type: string
+      update:
+        type: object
+        properties:
+          tag_name:
+            type: string
 
 # securityDefinitions:
 #   cookie:
@@ -283,10 +295,23 @@ paths:
         200:
           description: ok
           schema:
-            type: object
-            properties:
-              version:
-                type: string
+            $ref: "#/definitions/InfoType"
+
+  /upgrade:
+    get:
+      summary: Check if new updates available and fetch /info
+      responses:
+        204:
+          description: no update
+        200:
+          description: ok
+          schema:
+            $ref: "#/definitions/InfoType"
+    post:
+      summary: Upgrade the server
+      responses:
+        200:
+          description: Server binary was replaced by new version, server has shut down.
 
   # Authentication
   /auth/login: