Support a basic image on Docker Hub (#498)

* Revert "Revert "Merge branch 'docker-test'""

This reverts commit 2b4bcb1136.

* Use node 12 for docker image

* More thoroughly limit deploy to master pushes

* Use discordirc/discord-irc repo for Docker

* Tag git commit image for Docker hub

* Add .dockerignore

.dockerignore

@@ -0,0 +1,20 @@
+.git
+
+# Coverage directory used by tools like istanbul
+coverage
+.nyc_output
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directory
+# https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git-
+node_modules
+
+# Environment variables and configuration
+.env
+.environment
+config.json
+
+# Build
+dist/

.travis.yml

@@ -6,3 +6,17 @@ node_js:
   - '10'
   - '12'
   - '13'
+jobs:
+  include:
+    - stage: deploy
+      if: branch = master AND type = push
+      node_js: '12'
+      services:
+        - docker
+      script: skip
+      after_success: echo Skipping coverage.
+      deploy:
+        provider: script
+        script: bash docker-deploy.sh
+        on:
+          branch: master

Dockerfile

@@ -0,0 +1,15 @@
+FROM node:12-alpine
+ENV LIBRARY_PATH=/lib:/usr/lib
+
+RUN mkdir /bot
+COPY . /bot
+
+WORKDIR /bot
+
+RUN apk add --update tini && \
+	npm install && \
+	npm run build && \
+	mkdir /config
+
+ENTRYPOINT ["/sbin/tini", "--"]
+CMD ["npm", "start", "--", "--config", "/config/config.json"]

README.md

@@ -38,6 +38,24 @@ import config from './config.json';
 discordIRC(config);
 ```
 
+## Docker
+As an alternative to running discord-irc directly on your machine, we provide a [Docker container image](https://hub.docker.com/r/discordirc/discord-irc).
+After creating a configuration file, you can fetch the image from Docker Hub and run it with the following command:
+
+```bash
+docker run -v /path/to/config:/config/config.json discordirc/discord-irc
+```
+
+If you've checked out the repository already, you can build the Docker image locally and run that instead:
+
+```bash
+docker build -t discord-irc .
+docker run -v /path/to/config:/config/config.json discord-irc
+```
+
+Note that the path to the config file on the host (`/path/to/config`) _must_ be a valid absolute path to a config file.
+Otherwise, you may get the error "illegal operation on a directory".
+
 ## Configuration
 First you need to create a Discord bot user, which you can do by following the instructions [here](https://github.com/reactiflux/discord-irc/wiki/Creating-a-discord-bot-&-getting-a-token).
 

docker-deploy.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -e
+
+echo "Connecting to docker hub"
+echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
+
+REPO=discordirc/discord-irc
+
+echo "Building..."
+docker build -t $REPO:latest -t $REPO:$TRAVIS_COMMIT .
+
+echo "Pushing image to Docker Hub..."
+docker push $REPO:latest
+docker push $REPO:$TRAVIS_COMMIT