Add Docker container functionality

Discord bot could potentially be Dockerized easily.
Construct Docker container for it. This requires
some adjustments:

- Add build process to package.json to allow
  for multi-stage builds
- Modify Logger to have JSON format for stdout.
  While having colorized output is nice for stdout,
  JSON is far more useful and the only method
  we can access said output for Docker containers.

In the future, creating a LoggerManager might be
the way to go, since we'll need to dependency
inject envvars, among other things, which may
let us dynamically allocate transports depending
on environment. This could let us maintain colorized output locally whilst having JSON
stdout logs for the Docker container environment.

Author: StormFireFox1

Dockerfile

@@ -0,0 +1,19 @@
+FROM node:14-alpine AS builder
+WORKDIR /usr/src/bot
+COPY package*.json ./
+RUN npm ci
+COPY tsconfig.json ./
+COPY src src
+RUN npm run build
+
+FROM node:14-alpine
+ENV NODE_ENV=production
+RUN apk add --no-cache tini curl
+WORKDIR /usr/src/bot
+COPY package*.json ./
+RUN npm install
+COPY --from=builder /usr/src/bot/dist dist
+RUN chown -R node:node .
+USER node
+WORKDIR /usr/src/bot/dist
+CMD ["tini", "--", "node", "src/index.js"]

package.json

@@ -4,6 +4,7 @@
   "description": "ACM at UCSD's Discord Bot",
   "main": "server.js",
   "scripts": {
+    "build": "tsc",
     "lint": "eslint src --ext .ts",
     "lint:fix": "eslint src --ext .ts --fix",
     "test": "echo \"Error: no test specified\" && exit 1",

src/utils/Logger.ts

@@ -2,23 +2,11 @@ import {
   createLogger, transports as Transports, format,
 } from 'winston';
 import 'winston-daily-rotate-file';
-import { DateTime } from 'luxon';
 
 const {
-  printf, combine, json, timestamp, colorize,
+  combine, json, timestamp,
 } = format;
 
-/**
- * Formatting for the standard output transport.
- *
- * Ideally, we don't have to read JSON whilst reading stdout, so we'll make a readable format
- * with the timestamp, log level and message.
- */
-const consoleLogFormat = printf((information) => {
-  const currentTime = DateTime.now().setZone('America/Los_Angeles').toISO();
-  return `[${currentTime}] [${information.level}]: ${information.message}`;
-});
-
 /**
  * Logger for the bot with split transports.
  *
@@ -30,7 +18,7 @@ export default createLogger({
   transports: [
     new Transports.Console({
       level: 'debug',
-      format: combine(colorize(), consoleLogFormat),
+      format: combine(timestamp(), json()),
     }),
     new Transports.DailyRotateFile({
       level: 'info',