fix - change requirement from app to root path

Dockerfile

@@ -13,7 +13,7 @@ ENV PYTHONUNBUFFERED 1
 
 # install dependencies
 RUN pip install --upgrade pip
-COPY ./requirements.txt /app/
+COPY ./requirements.txt .
 RUN --mount=type=cache,target=/root/.cache/pip \
     pip install --no-cache-dir -r requirements.txt