Add Dockerfile

docker/Dockerfile

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+FROM golang:alpine
+
+# Set necessary environmet variables needed for our image
+ENV GO111MODULE=on \
+    CGO_ENABLED=0 \
+    GOOS=linux \
+    GOARCH=amd64 
+
+
+
+ENV PATH /usr/lib/postgresql/$PG_MAJOR/bin:$PATH
+ENV PGDATA /var/lib/postgresql/data
+ENV POSTGRES_DB headscale
+ENV POSTGRES_USER admin
+
+ENV LANG en_US.utf8
+
+RUN apk update && \
+    apk add git su-exec tzdata libpq postgresql-client postgresql postgresql-contrib gnupg supervisor inotify-tools wireguard-tools openssh && \
+    mkdir /docker-entrypoint-initdb.d && \
+    rm -rf /var/cache/apk/*
+
+RUN gpg --keyserver ipv4.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4
+RUN gpg --list-keys --fingerprint --with-colons | sed -E -n -e 's/^fpr:::::::::([0-9A-F]+):$/\1:6:/p' | gpg --import-ownertrust
+RUN wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/1.7/gosu-amd64" && \
+    wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/1.7/gosu-amd64.asc" && \
+    gpg --verify /usr/local/bin/gosu.asc && \
+    rm /usr/local/bin/gosu.asc && \
+    chmod +x /usr/local/bin/gosu
+RUN apk --purge del gnupg ca-certificates
+
+VOLUME /var/lib/postgresql/data
+
+
+
+
+RUN rm -rf /etc/ssh/ssh_host_rsa_key /etc/ssh/ssh_host_dsa_key
+
+WORKDIR /build
+
+RUN git clone https://github.com/juanfont/headscale.git
+
+WORKDIR /build/headscale
+
+RUN go build cmd/headscale/headscale.go 
+
+COPY headscale.sh /headscale.sh
+COPY postgres.sh /postgres.sh
+COPY supervisord.conf /etc/supervisord.conf
+
+WORKDIR /
+
+RUN mkdir -p /run/postgresql
+RUN chown postgres:postgres /run/postgresql
+
+RUN adduser -S headscale
+
+#ENV GIN_MODE release
+
+EXPOSE 8000
+
+CMD ["supervisord","--nodaemon", "--configuration", "/etc/supervisord.conf"]

docker/headscale.sh

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+#!/bin/bash
+cd /build/headscale
+echo 'Writing config...'
+echo '''
+{
+    "server_url": "$SERVER_URL",
+    "listen_addr": "0.0.0.0:8000",
+    "private_key_path": "private.key",
+    "public_key_path": "public.key",
+    "db_host": "localhost",
+    "db_port": 5432,
+    "db_name": "headscale",
+    "db_user": "admin",
+    "db_pass": "$POSTGRES_PASSWORD"
+}
+''' > config.json
+
+# Wait until PostgreSQL started and listens on port 5432.
+while [ -z "`netstat -tln | grep 5432`" ]; do
+  echo 'Waiting for PostgreSQL to start ...'
+  sleep 1
+done
+echo 'PostgreSQL started.'
+
+# Start server.
+echo 'Starting server...'
+
+./headscale

docker/postgres.sh

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+#!/bin/sh
+chown -R postgres "$PGDATA"
+if [ -z "$(ls -A "$PGDATA")" ]; then
+    gosu postgres initdb
+    sed -ri "s/^#(listen_addresses\s*=\s*)\S+/\1'*'/" "$PGDATA"/postgresql.conf
+
+    : ${POSTGRES_USER:="postgres"}
+    : ${POSTGRES_DB:=$POSTGRES_USER}
+
+    if [ "$POSTGRES_PASSWORD" ]; then
+      pass="PASSWORD '$POSTGRES_PASSWORD'"
+      authMethod=md5
+    else
+      echo "==============================="
+      echo "!!! NO PASSWORD SET !!! (Use \$POSTGRES_PASSWORD env var)"
+      echo "==============================="
+      pass=
+      authMethod=trust
+    fi
+    echo
+
+
+    if [ "$POSTGRES_DB" != 'postgres' ]; then
+      createSql="CREATE DATABASE $POSTGRES_DB;"
+      echo $createSql | gosu postgres postgres --single -jE
+      echo
+    fi
+
+    if [ "$POSTGRES_USER" != 'postgres' ]; then
+      op=CREATE
+    else
+      op=ALTER
+    fi
+
+    userSql="$op USER $POSTGRES_USER WITH SUPERUSER $pass;"
+    echo $userSql | gosu postgres postgres --single -jE
+    echo
+
+    gosu postgres pg_ctl -D "$PGDATA" \
+        -o "-c listen_addresses=''" \
+        -w start
+
+    echo
+    for f in /docker-entrypoint-initdb.d/*; do
+        case "$f" in
+            *.sh)  echo "$0: running $f"; . "$f" ;;
+            *.sql) echo "$0: running $f"; psql --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" < "$f" && echo ;;
+            *)     echo "$0: ignoring $f" ;;
+        esac
+        echo
+    done
+
+    gosu postgres pg_ctl -D "$PGDATA" -m fast -w stop
+
+    { echo; echo "host all all 0.0.0.0/0 $authMethod"; } >> "$PGDATA"/pg_hba.conf
+fi
+
+exec gosu postgres postgres

docker/run.sh

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+# Example of how to user the docker image
+POSTGRES_PASSWORD=
+docker build . -t headscale-docker
+docker run -p 8000:8000 -v $(pwd)/pgdata:/var/lib/postgresql/data -v "$(pwd)/private.key:/build/headscale/private.key" -v "$(pwd)/public.key:/build/headscale/public.key" -e SERVER_URL=127.0.0.1:8000 -e POSTGRES_PASSWORD=$POSTGRES_PASSWORD -ti headscale-docker

docker/supervisord.conf

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+[supervisord]
+nodaemon=true
+user = root
+
+[program:headscale]
+command=/bin/bash -c "/headscale.sh"
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+
+[program:postgres]
+command=/bin/bash -c "/postgres.sh"
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0