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# base image
FROM debian:buster

# disable dpkg interactive-mode
ENV DEBIAN_FRONTEND noninteractive

# set work dir
WORKDIR /var/www/app

# install nginx
RUN apt-get update
RUN apt-get install -y nginx

# install openssl & ssl-cert
RUN apt-get install -y openssl ssl-cert

# create dhparam.pem
RUN mkdir -p /etc/nginx/ssl
RUN openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

# disable default vhost
RUN unlink /etc/nginx/sites-enabled/default

# remove apt-cache leftovers
RUN apt-get clean
RUN rm -rf /var/lib/apt/lists/*

# set default CMD
CMD /usr/sbin/nginx -g 'daemon off;'