Fix: Permission denied error for logs directory on GPU Space

CRITICAL FIX for Space hardware migration (CPU -> GPU):
- GPU Spaces run as non-root user (different from CPU)
- Old code failed with 'PermissionError: Permission denied: /app/logs/'

Changes:
1. main.py: Wrap logger.add() in try-except, create logs dir with mkdir
2. worker.py: Same permission handling for worker logs
3. Dockerfile: Create logs directory with 777 permissions (chmod -R 777 logs)

Behavior:
- Try to create and write to logs directory
- If permission denied, gracefully fallback to stdout only
- Log warning but don't crash the application

This allows the app to run on:
- CPU Spaces (root user)
- GPU Spaces (non-root user)
- Any hardware tier without modification

Error fixed:
PermissionError: [Errno 13] Permission denied: '/app/logs/swara_api_2025-11-13.log'

Dockerfile

@@ -22,8 +22,9 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Copy application code
 COPY . .
 
-# Create necessary directories
-RUN mkdir -p temp models logs
+# Create necessary directories with proper permissions
+RUN mkdir -p temp models logs && \
+    chmod -R 777 temp logs
 
 # Expose port
 EXPOSE 7860

app/main.py

@@ -2,6 +2,8 @@
 FastAPI Main Application
 """
 import sys
+import os
+from pathlib import Path
 from contextlib import asynccontextmanager
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
@@ -20,13 +22,22 @@ logger.add(
     format="<green>{time:YYYY-MM-DD HH:mm:ss}</green> | <level>{level: <8}</level> | <cyan>{name}</cyan>:<cyan>{function}</cyan> - <level>{message}</level>",
     level=settings.LOG_LEVEL
 )
-logger.add(
-    "logs/swara_api_{time:YYYY-MM-DD}.log",
-    rotation="1 day",
-    retention="7 days",
-    format="{time:YYYY-MM-DD HH:mm:ss} | {level: <8} | {name}:{function} - {message}",
-    level=settings.LOG_LEVEL
-)
+
+# Create logs directory if it doesn't exist
+try:
+    log_dir = Path("logs")
+    log_dir.mkdir(parents=True, exist_ok=True)
+    
+    logger.add(
+        "logs/swara_api_{time:YYYY-MM-DD}.log",
+        rotation="1 day",
+        retention="7 days",
+        format="{time:YYYY-MM-DD HH:mm:ss} | {level: <8} | {name}:{function} - {message}",
+        level=settings.LOG_LEVEL
+    )
+except (PermissionError, OSError) as e:
+    # If we can't write to logs directory, only use stdout
+    logger.warning(f"Cannot create log file: {e}. Using stdout only.")
 
 
 @asynccontextmanager

app/worker.py

@@ -2,6 +2,8 @@
 RQ Worker Entry Point
 """
 import sys
+import os
+from pathlib import Path
 from loguru import logger
 from redis import Redis
 from rq import Worker, Queue
@@ -17,13 +19,22 @@ logger.add(
     format="<green>{time:YYYY-MM-DD HH:mm:ss}</green> | <level>{level: <8}</level> | <cyan>{name}</cyan>:<cyan>{function}</cyan> - <level>{message}</level>",
     level=settings.LOG_LEVEL
 )
-logger.add(
-    "logs/swara_worker_{time:YYYY-MM-DD}.log",
-    rotation="1 day",
-    retention="7 days",
-    format="{time:YYYY-MM-DD HH:mm:ss} | {level: <8} | {name}:{function} - {message}",
-    level=settings.LOG_LEVEL
-)
+
+# Create logs directory if it doesn't exist
+try:
+    log_dir = Path("logs")
+    log_dir.mkdir(parents=True, exist_ok=True)
+    
+    logger.add(
+        "logs/swara_worker_{time:YYYY-MM-DD}.log",
+        rotation="1 day",
+        retention="7 days",
+        format="{time:YYYY-MM-DD HH:mm:ss} | {level: <8} | {name}:{function} - {message}",
+        level=settings.LOG_LEVEL
+    )
+except (PermissionError, OSError) as e:
+    # If we can't write to logs directory, only use stdout
+    logger.warning(f"Cannot create log file: {e}. Using stdout only.")
 
 
 def main():