proxy.sh

#!/bin/bash
set -o errexit  # abort on nonzero exitstatus
set -o nounset  # abort on unbound variable
set -o pipefail # don't hide errors within pipes

options=$(getopt -o c:r:h --long config:,root:,help -- "$@")
eval set -- "$options"

image="nginx:stable-alpine-slim"
container_name="nginx-proxy"
network_name="nginx-net"

# Default values
config="$(realpath -e "$(dirname "$0")/nginx.conf")"
root="$(realpath -e "$(dirname "$0")/www")"

parse_options() {
    while true; do
        case "$1" in
        -c | --config)
            config="$(realpath -e "$2")"
            shift 2
            ;;
        -r | --root)
            root="$(realpath -e "$2")"
            shift 2
            ;;
        -h | --help)
            echo "Usage: $0 [options]"
            echo
            echo "Options:"
            echo "  -h, --help           Display this help message"
            echo "  -c, --config <file>  Path to the nginx configuration file"
            echo "  -r, --root <dir>     Path to the static directory"
            exit
            ;;
        --)
            shift
            break
            ;;
        *)
            exit 1
            ;;
        esac
    done
}

parse_options "$@"

echo
echo -e "config file: ${config}"
echo -e "static directory: ${root}"

start() {
    echo
    echo -e "Starting proxy"
    echo
    echo -e "  using image:    ${image}"
    echo -e "  container name: ${container_name}"
    echo -e "  network name:   ${network_name}"
    echo

    echo -e "Creating network: ${network_name}"
    docker network create ${network_name}

    echo
    echo -e "Starting container: ${container_name}"
    docker run \
        --pull "always" \
        --rm \
        --detach \
        --name "${container_name}" \
        --network "${network_name}" \
        --publish 80:80 \
        --volume "${config}":/etc/nginx/nginx.conf:ro \
        --volume "${root}":/www:ro \
        "${image}"

    echo
    echo -e "Proxy started"
    echo
}

stop() {
    echo
    echo -e "Stopping proxy"
    echo

    echo -e "Stopping container"
    docker kill ${container_name} || true # allow the script to continue even if the container is not running
    echo
    echo -e "Removing network"
    docker network rm ${network_name}
}

trap 'stop' EXIT # automatically stop container on exit (e.g. CTRL+C)

start

sleep infinity # keep running until CTRL+C