Dockerfile

-FROM buildpack-deps:buster
+FROM buildpack-deps:bullseye
 # hadolint ignore=DL3008,DL3013
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
@@ -7,7 +7,6 @@ RUN apt-get update && \
         python3-pip \
         python3-setuptools \
         python3-venv \
-        shellcheck \
     && \
     python3 -m pip install --no-cache-dir --upgrade pip && \
     python3 -m pip install --no-cache-dir \