Update Dockerfile

Dockerfile

@@ -9,11 +9,11 @@ COPY . /app
 RUN pip install --no-cache-dir -r requirements.txt
 RUN pip install --no-cache-dir opencv-python-headless -i https://pypi.org/simple
 
-# Create directories and files, then set permissions explicitly
+# Create directories and files, set permissions conditionally for config.txt
 RUN mkdir -p /app/presets /app/logs /app/repositories/Fooocus/models/sam /app/repositories/Fooocus/outputs && \
     touch /app/config_modification_tutorial.txt && \
     chmod -R 775 /app/presets /app/logs /app/repositories/Fooocus/models/sam /app/repositories/Fooocus/outputs /app/config_modification_tutorial.txt && \
-    chmod 775 /app/config.txt
+    [ -f /app/config.txt ] && chmod 775 /app/config.txt || touch /app/config.txt && chmod 775 /app/config.txt
 
 EXPOSE 8888