Use gzip middleware

main.py

@@ -8,6 +8,7 @@ from pydantic import BaseModel
 from starlette.responses import FileResponse, JSONResponse
 from fastapi import FastAPI, File, UploadFile, Response, status, Request, Body
 from fastapi.responses import PlainTextResponse
+from fastapi.middleware.gzip import GZipMiddleware
 from tjnetwork import *
 
 JUNCTION = 0
@@ -31,6 +32,8 @@ if not os.path.exists(tmpDir):
 
 app = FastAPI()
 
+app.add_middleware(GZipMiddleware, minimum_size=1000)
+
 ### project
 
 @app.get('/listprojects/')
@@ -180,7 +183,7 @@ async def fastapi_take_snapshot_for_current_operation(network: str, tag: str) ->
     return take_snapshot_for_current_operation(network, tag)
     
 @app.post('/takesnapshot/')
-def fastapi_take_snapshot(network: str, tag: str) -> int | None:
+def fastapi_take_snapshot(network: str, tag: str) -> None:
     return take_snapshot(network, tag)
 
 @app.post('/picksnapshot/')