pngnq
tool for optimizing PNG (Portable Network Graphics) images
RUN apt-get update && \
apt-get install -y pngnq
RUN apt-get update && \
apt-get install -y pngnq
RUN apt-get update && \
apt-get install -y pngnq
RUN yum install -y pngnq
RUN dnf install -y pngnq
RUN apt-get update && \
apt-get install -y pngnq