Update Dockerfile to Address Outdated Base Image and Dependency Issues

Dockerfile

@@ -1,53 +1,53 @@
-FROM debian:stretch-20170907
+# FROM debian:stretch-20170907
+FROM debian:bullseye
 
 ENV DEBIAN_FRONTEND noninteractive
 
 RUN apt-get update && \
     apt-get upgrade -y && \
-    apt-get install -y apt-utils \
-                       forensics-all \
-                       foremost \
-                       binwalk \
-                       exiftool \
-                       outguess \
-                       pngtools \
-                       pngcheck \
-                       stegosuite \
-                       git \
-                       hexedit \
-                       python3-pip \
-                       python-pip \
-                       autotools-dev \
-                       automake \
-                       libevent-dev \
-                       bsdmainutils \
-                       ffmpeg \
-                       crunch \
-                       cewl \
-                       sonic-visualiser \
-                       xxd \
-                       atomicparsley && \
-    pip3 install python-magic && \
-    pip install tqdm
+    apt-get install -y --no-install-recommends \
+        apt-utils \
+        forensics-all \
+        foremost \
+        binwalk \
+        exiftool \
+        outguess \
+        pngtools \
+        pngcheck \
+        stegosuite \
+        git \
+        hexedit \
+        python3-pip \
+        autotools-dev \
+        automake \
+        libevent-dev \
+        bsdmainutils \
+        ffmpeg \
+        crunch \
+        cewl \
+        sonic-visualiser \
+        xxd \
+        atomicparsley && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN pip3 install --no-cache-dir python-magic tqdm
 
 COPY install /tmp/install
 RUN chmod a+x /tmp/install/*.sh && \
-    for i in /tmp/install/*.sh;do echo $i && $i;done && \
+    for script in /tmp/install/*.sh; do /bin/bash "$script"; done && \
     rm -rf /tmp/install
 
-# Use this section to try new installation scripts.
-# All previous steps will be cached
-#
-# COPY install_dev /tmp/install
-# RUN find /tmp/install -name '*.sh' -exec chmod a+x {} + && \
-#     for f in $(ls /tmp/install/* | sort );do /bin/sh $f;done && \
-#     rm -rf /tmp/install
-
 COPY examples /examples
 
+# COPY scripts /opt/scripts
+# RUN chmod a+x /opt/scripts/*.{sh,py}
+
 COPY scripts /opt/scripts
-RUN find /opt/scripts -name '*.sh' -exec chmod a+x {} + && \
-    find /opt/scripts -name '*.py' -exec chmod a+x {} +
+RUN if [ -d /opt/scripts ]; then \
+        find /opt/scripts -type f \( -name '*.sh' -o -name '*.py' \) -exec chmod a+x {} +; \
+    fi
+
 ENV PATH="/opt/scripts:${PATH}"
 
 WORKDIR /data