add packages, env vars, and docker scripts

.env.example

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+IMAGE_NAME=vpnproxy
+DOCKER_PREFIX=proxy
+VPN_USER=user
+VPN_PASS=pass

docker/Dockerfile

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+FROM alpine:3.7
+
+EXPOSE 8118
+
+RUN apk add --no-cache \
+  git bash supervisor python iptables \
+  openvpn privoxy
+
+# OpenVPN
+ADD config/openvpn/supervisord-openvpn.ini /etc/supervisor.d/supervisord-openvpn.ini
+ADD config/openvpn/openvpn-start.sh /usr/local/bin/
+RUN chmod +x /usr/local/bin/openvpn-start.sh
+
+# Privoxy
+ADD config/privoxy/privoxy-start.sh /usr/local/bin/
+ADD config/privoxy/supervisord-privoxy.ini /etc/supervisor.d/supervisord-privoxy.ini
+RUN sed -i'' 's/127\.0\.0\.1:8118/0\.0\.0\.0:8118/' /etc/privoxy/config && \
+    sed -i'' 's/enable-edit-actions\ 0/enable-edit-actions\ 1/' /etc/privoxy/config && \
+    sed -i'' 's/#max-client-connections/max-client-connections/' /etc/privoxy/config && \
+    sed -i'' 's/accept-intercepted-requests\ 0/accept-intercepted-requests\ 1/' /etc/privoxy/config
+RUN chmod +r /etc/privoxy/config && chmod +x /usr/local/bin/privoxy-start.sh
+
+CMD ["supervisord", "-n"]
+VOLUME [ "/ovpn" ]

docker/build.sh

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+#!/bin/bash
+
+export $(egrep -v '^#' ../.env | xargs)
+
+PREFIX=${DOCKER_PREFIX:-proxy}
+
+docker build -t $PREFIX .

docker/config/openvpn/openvpn-start.sh

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+#!/bin/bash
+
+printf "$VPN_USER\n$VPN_PASS" > auth.txt
+openvpn --config ovpn/$OVPN_FILE --auth-user-pass auth.txt

docker/config/openvpn/supervisord-openvpn.ini

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+[program:openvpn]
+command=openvpn-start.sh
+numprocs=1
+autostart=true
+autorestart=true

docker/config/privoxy/privoxy-start.sh

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+#!/bin/sh
+
+CONFFILE=/etc/privoxy/config
+PIDFILE=/var/run/privoxy.pid
+
+if [ ! -f "${CONFFILE}" ]; then
+	echo "Configuration file ${CONFFILE} not found!"
+	exit 1
+fi
+
+/usr/sbin/privoxy --no-daemon --pidfile "${PIDFILE}" "${CONFFILE}"

docker/config/privoxy/supervisord-privoxy.ini

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+[program:privoxy]
+command=privoxy-start.sh
+numprocs=1
+autostart=true
+autorestart=true

package.json

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+{
+  "name": "vpn-proxy",
+  "version": "1.0.0",
+  "main": "index.js",
+  "license": "MIT",
+  "scripts": {
+    "start": "node src/index.js",
+    "build": "cd docker && ./build.sh"
+  },
+  "dependencies": {
+    "dockerode": "^2.5.8",
+    "dotenv": "^6.2.0",
+    "fs-extra": "^7.0.1",
+    "http-proxy": "^1.17.0",
+    "lodash": "^4.17.11"
+  },
+  "devDependencies": {
+    "prettier": "^1.16.4",
+    "standard": "^12.0.1"
+  }
+}