Update Dockerfile

Dockerfile

@@ -4,7 +4,8 @@ ENV DEBIAN_FRONTEND=noninteractive \
 
 # Remove any third-party apt sources to avoid issues with expiring keys.
 # Install some basic utilities
-RUN apt-get update && apt-get install -y --no-install-recommends \
+RUN rm -f /etc/apt/sources.list.d/*.list && \
+    apt-get update && apt-get install -y --no-install-recommends \
     curl \
     ca-certificates \
     sudo \
@@ -21,7 +22,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libx11-6 \
     build-essential \
     libsndfile-dev \
-    software-properties-common
+    software-properties-common \
+ && rm -rf /var/lib/apt/lists/*
 
 RUN add-apt-repository ppa:flexiondotorg/nvtop && \
     apt-get upgrade -y && \