feat: update docs, fix repository, full working github callback, fix healthcheck in docker file, update makefile

backend/docs/swagger.yaml

@@ -6,7 +6,7 @@ definitions:
     properties:
       content:
         type: string
-      createdAt:
+      created_at:
         type: string
       id:
         type: integer
@@ -32,21 +32,45 @@ definitions:
 info:
   contact: {}
 paths:
+  /auth/github:
+    get:
+      description: Redirects to GitHub authorization
+      responses:
+        "302":
+          description: Found
+      summary: Start GitHub OAuth login
+      tags:
+      - auth
   /callback/github:
     get:
-      consumes:
-      - application/json
-      description: Callback for oauth2 providers
+      description: Exchanges authorization code for access token
+      parameters:
+      - description: Authorization code
+        in: query
+        name: code
+        required: true
+        type: string
       produces:
       - application/json
       responses:
         "200":
-          description: OK
+          description: Access token
+          schema:
+            additionalProperties: true
+            type: object
+        "400":
+          description: Missing code
           schema:
             additionalProperties:
               type: string
             type: object
-      summary: Callback for oauth2 providers
+        "500":
+          description: Exchange failed
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+      summary: GitHub OAuth callback
       tags:
       - auth
   /posts: