Add docker setup files

Using docker compose since we have two containers:
- One for the hub running a nodejs-alpine image
- The other for a mysql database

Author: seanjparker

.dockerignore

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+.vscode
+.git*
+.env
+.dockerignore
+*Dockerfile*
+*docker-compose*
+**/node_modules
+dist
+coverage

Dockerfile

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+FROM node:9-alpine
+
+RUN npm i npm@latest -g
+
+## Install build toolchain, install node deps and compile native add-ons
+RUN apk add --no-cache --virtual python make g++
+
+# Create app directory
+RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app
+
+# Set the working directory for the application
+WORKDIR /home/node/app
+
+# Before running install, switch to non-root user "node"
+USER node
+
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+COPY package*.json ./
+
+# Install app dependencies
+RUN npm ci
+
+WORKDIR /home/node/app
+COPY . .
+
+EXPOSE 5000
+CMD [ "npm", "run", "start:watch" ]

docker-compose.yml

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+version: '2.1'
+services:
+  hub-dev:
+    container_name: hub
+    build: .
+    depends_on:
+      mysql_db:
+        condition: service_healthy
+    volumes:
+      - .:/home/node/app/
+      - /home/node/app/node_modules
+    environment:
+      - DB_TYPE=mysql
+      - DB_HOST=mysql_db
+      - DB_USER=root
+      - DB_PASSWORD=root
+      - DB_DATABASE=hub
+    ports:
+      - "5000:5000"
+    networks:
+      - backend
+  mysql_db:
+    container_name: mysql_db
+    image: mysql:5.7
+    command: --default-authentication-plugin=mysql_native_password --log_error_verbosity=1
+    environment:
+      MYSQL_ROOT_PASSWORD: root
+      MYSQL_DATABASE: hub
+    ports:
+      - "3306:3306"
+    healthcheck:
+      test: ["CMD-SHELL", "mysqladmin ping -h localhost --silent"]
+      timeout: 5s
+      retries: 10
+    networks:
+      - backend
+networks:
+  backend: