Add very initial dockerfile contributed by @prologic and @euank

Dockerfile

@@ -0,0 +1,17 @@
+FROM golang:rc
+
+EXPOSE 6667/tcp 6697/tcp
+
+RUN apt-get install -y git
+
+RUN mkdir -p /go/src/github.com/oragono
+WORKDIR /go/src/github.com/oragono
+
+RUN git clone https://github.com/oragono/oragono.git
+WORKDIR /go/src/github.com/oragono/oragono
+RUN git submodule update --init
+RUN go build oragono.go
+
+COPY run.sh /go/src/github.com/oragono/oragono
+
+CMD ["./run.sh"]

docker-compose.yml

@@ -0,0 +1,19 @@
+version: "3.2"
+
+services:
+  oragono:
+    image: oragono/oragono
+    ports:
+      - "6667:6667/tcp"
+      - "6697:6697/tcp"
+    deploy:
+      placement:
+        constraints:
+          - "node.role == manager"
+      restart_policy:
+        condition: on-failure
+      replicas: 1
+
+networks:
+  traefik:
+    external: true

run.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+set -e
+
+if [ ! -f ./ircd.yaml ]; then
+  cp oragono.yaml ircd.yaml
+fi
+
+if [ ! -f ircd.db ]; then
+  ./oragono initdb
+fi
+
+if [ ! -f tls.crt ]; then
+  ./oragono mkcerts
+fi
+
+exec ./oragono run