Fix Dockerfile working directory and permissions setup to ensure proper access to application files

Dockerfile

@@ -16,7 +16,7 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Set working directory
-WORKDIR /
+WORKDIR /app
 
 # Install Python dependencies (cached if requirements.txt doesn't change)
 COPY requirements.txt .
@@ -26,7 +26,7 @@ RUN pip install --upgrade pip && pip install -r requirements.txt
 COPY . .
 
 # Set permissions (do this *after* copying files)
-RUN chmod -R 777 /
+RUN chmod -R 777 /app
 
 # Setup SSH known_hosts (only runs if above layers change)
 RUN mkdir -p /root/.ssh && \