Update config structure and enhance file handling

Renamed API_V1_STR to API_VERSION_STR for consistency. Introduced 'UPLOAD_FOLDER' and ensured its creation, added logging for the data directory path, and implemented allowed image content type validation. Adjusted related references in `main.py`.

backend/app/core/config.py

@@ -1,4 +1,5 @@
 import os
+from pathlib import Path
 
 from pydantic_settings import BaseSettings
 from typing import Optional, List
@@ -7,8 +8,13 @@ from typing import Optional, List
 class Settings(BaseSettings):
     PROJECT_NAME: str = "EventSpace"
     VERSION: str = "1.0.0"
-    API_V1_STR: str = "/api/v1"
-    DATA_FILES_DIR: str = os.getenv('DATA_FILES_DIR', 'data/')
+    API_VERSION_STR: str = "/api/v1"
+    DATA_FILES_DIR: str = os.getenv('DATA_FILES_DIR', '/data')
+    UPLOAD_FOLDER: str = str(Path(DATA_FILES_DIR) / 'uploads')
+    os.makedirs(UPLOAD_FOLDER, exist_ok=True)
+    print(
+        f"Data files directory: {DATA_FILES_DIR}"
+    )
 
     # Database configuration
     POSTGRES_USER: str = "postgres"
@@ -30,6 +36,15 @@ class Settings(BaseSettings):
 
     REFRESH_TOKEN_EXPIRE_DAYS: int = 60
 
+    # Configure allowed content types for images
+    ALLOWED_IMAGE_TYPES: List[str] = [
+        "image/jpeg",
+        "image/png",
+        "image/gif",
+        "image/svg+xml",
+        "image/webp"
+    ]
+
     @property
     def database_url(self) -> str:
         """

backend/app/main.py

@@ -17,7 +17,7 @@ logger.info(f"Starting app!!!")
 app = FastAPI(
     title=settings.PROJECT_NAME,
     version=settings.VERSION,
-    openapi_url=f"{settings.API_V1_STR}/openapi.json"
+    openapi_url=f"{settings.API_VERSION_STR}/openapi.json"
 )
 
 # Set up CORS middleware
@@ -46,5 +46,5 @@ async def root():
     """
 
 
-app.include_router(api_router, prefix=settings.API_V1_STR)
+app.include_router(api_router, prefix=settings.API_VERSION_STR)
 app.mount("/files", StaticFiles(directory=settings.DATA_FILES_DIR), name="static")