Optimizing image size

* fix debian source.list syntax
* remove unused packages

Dockerfile

@@ -1,38 +1,29 @@
 FROM debian:latest
 
-RUN sed -i 's/main/main contrib non-free/' /etc/apt/sources.list.d/debian.sources \
-    && apt-get update && apt-get upgrade -y \
-    && apt-get install -y --no-install-recommends \
-    apache2-utils \
+RUN sed -i 's/Components: main/Components: main contrib non-free non-free-firmware/' /etc/apt/sources.list.d/debian.sources \
+    && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get upgrade -y \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
     arping \
     atop \
     bash \
-    blktrace \
     bridge-utils \
     ca-certificates \
     curl \
     dnsutils \
-    dstat \
-    duplicity \
     ethtool \
     file \
     git \
     host \
     htop \
     iftop \
-    iotop \
     iperf \
     iproute2 \
     iputils-ping \
     jid \
     jq \
     less \
-    lftp \
     lsof \
     ltrace \
-    mariadb-client \
-    manpages \
-    man-db \
     mtr-tiny \
     netcat-traditional \
     netcat-openbsd \
@@ -42,28 +33,24 @@ RUN sed -i 's/main/main contrib non-free/' /etc/apt/sources.list.d/debian.source
     nmap \
     openssl \
     openssh-client \
-    postgresql-client \
     procps \
-    python3 \
-    python3-requests \
     rclone \
     restic \
     rsync \
-    sg3-utils \
-    siege \
     socat \
     strace \
-    stress \
-    stress-ng \
     telnet \
     tcpdump \
     tini \
     traceroute \
     unzip \
-    vim \
+    vim-tiny \
     wget \
+    && apt -y --purge remove \
+    git-man \
+    python3 \
+    sgml-base \
+    && apt -y autoremove \
     && apt-get clean all && rm -rf /var/lib/apt/lists/*
 
-COPY ./docker-entrypoint.sh /
-ENTRYPOINT ["/docker-entrypoint.sh"]
-CMD ["/bin/bash"]
+ENTRYPOINT ["/usr/bin/tini"]