change apt-get to apt

Dockerfile

@@ -5,7 +5,7 @@ WORKDIR /app
 COPY ./requirements.txt /app/requirements.txt
 COPY ./packages.txt /app/packages.txt
 
-RUN apt-get update && xargs -r -a /app/packages.txt apt-get install -y && rm -rf /var/lib/apt/lists/*
+RUN apt update && xargs -r -a /app/packages.txt apt install -y && rm -rf /var/lib/apt/lists/*
 RUN pip3 install --no-cache-dir -r /app/requirements.txt
 
 # User