feat(write_req): Close file after writing (#21)

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>

Author: asbjornst

src/server/write_req.rs

@@ -108,6 +108,9 @@ where
             }
         }
 
+        self.writer.flush().await?;
+        self.writer.close().await?;
+
         Ok(())
     }