fix: path relativity

backend/Dockerfile

@@ -10,11 +10,11 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Copy requirements and install dependencies with uv
-COPY backend/requirements.txt .
+COPY requirements.txt .
 RUN pip install --no-cache -r requirements.txt
 
 # Copy application code
-COPY backend/app/ ./app/
+COPY app/ ./app/
 
 # Create data directory for SQLite
 RUN mkdir -p /app/data