feat: use forms for course creation

src/services/uploads.py

@@ -0,0 +1,12 @@
+async def upload_thumbnail(thumbnail_file, name_in_disk):
+            contents = thumbnail_file.file.read()
+            try: 
+                with open(f"content/uploads/img/{name_in_disk}", 'wb') as f:
+                    f.write(contents)
+                    f.close()
+                    
+            except Exception as e:
+                print(e)
+                return {"message": "There was an error uploading the file"}
+            finally:
+                thumbnail_file.file.close()