changed app

Dockerfile

@@ -43,6 +43,9 @@ ENV PORT=7860 \
     DATA_DIR=/data \
     FRONTEND_DIST=/app/frontend_dist
 
+# Ensure data dir exists with permissive permissions (in case volume isn't mounted yet)
+RUN mkdir -p /data && chmod -R 777 /data
+
 EXPOSE 7860
 
 # Run FastAPI (serve API + static frontend)

backend/app/main.py

@@ -3,8 +3,11 @@ from fastapi.middleware.cors import CORSMiddleware
 from fastapi.staticfiles import StaticFiles
 import os
 
-from .api.routers.ocr import router as ocr_router
-from .api.routers.synthetic import router as synthetic_router
+"""Main FastAPI application (serves API and static frontend).
+
+Note: We delay importing routers until after DATA_DIR is finalized to avoid
+permission issues when creating directories on certain platforms (e.g., Spaces).
+"""
 
 
 app = FastAPI(title="Unified Backend: OCR + Synthetic")
@@ -22,13 +25,22 @@ app.add_middleware(
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 DEFAULT_DATA_DIR = os.path.join(BASE_DIR, "data")
 DATA_DIR = os.getenv("DATA_DIR", DEFAULT_DATA_DIR)
+try:
+    os.makedirs(DATA_DIR, exist_ok=True)
+except Exception:
+    # Fallback to non-persistent tmp if permission denied
+    DATA_DIR = "/tmp/data"
+    os.environ["DATA_DIR"] = DATA_DIR
+    os.makedirs(DATA_DIR, exist_ok=True)
+
 UPLOAD_DIR = os.path.join(DATA_DIR, "uploaded_images")
 SYN_OUT_DIR = os.path.join(DATA_DIR, "synth_outputs")
-
 os.makedirs(UPLOAD_DIR, exist_ok=True)
 os.makedirs(SYN_OUT_DIR, exist_ok=True)
 
-# Routers
+# Routers (import after DATA_DIR is finalized so they read correct env)
+from .api.routers.ocr import router as ocr_router
+from .api.routers.synthetic import router as synthetic_router
 app.include_router(ocr_router)
 app.include_router(synthetic_router)