Add docker build files

Dockerfile

@@ -0,0 +1,10 @@
+FROM node:slim
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm install --omit=dev
+
+COPY . .
+
+CMD node index.js

docker-compose.yml

@@ -0,0 +1,8 @@
+version: '3'
+services:
+  midjourney-reborn-bot:
+    container_name: midjourney-reborn-bot
+    build:
+      context: .
+    environment:
+      - NODE_ENV=production