V0.7.0-beta.2 SQLite backend

What's Changed

• SQLite-powered backend by @digizeph in #30

Deploy with Docker

version: '3'
services:
  bgpkit-broker:
    image: bgpkit/broker:0.7.0-beta.2
    ports:
      - "40064:40064"
    volumes:
      - ./data:/bgpkit-broker

Then run docker-compose up

Full Changelog: v0.7.0-beta.1...v0.7.0-beta.2