Add Docker configuration files and update requirements

docker-compose.yml

@@ -0,0 +1,13 @@
+version: '3.8'
+
+services:
+  web:
+    build: .
+    ports:
+      - "5000:5000"
+    environment:
+      - FLASK_APP=app.py
+      - FLASK_ENV=production
+    volumes:
+      - .:/app
+    restart: unless-stopped