Update project_structure.md

docs/project_structure.md

@@ -41,13 +41,12 @@ The `nginx` directory contains a NGINX configuration file and Docker container.
 The `tools` directory contains some shell scripts. They are used for CI, CD and so on.
 
 Also, there are directories and files contain doccano v0.x codes.
-In the future, they will be integrated into the currect code or removed:
+In the future, they will be integrated into the current code or removed:
 
 ```
 /
 ├── app/
 ├── └── server/
-└── docker-compose.yml
 ```
 
 ## Backend