Update README.md about development

README.md

@@ -22,3 +22,53 @@
 欢迎大家一起来共享数据和代码！
 
 这个世界会好的。
+
+## 在本地开发
+
+0. 不要使用主分支，请进入 `before-offline` 分支
+
+    ```bash
+    git checkout before-offline
+    ```
+
+1. 安装依赖
+
+    ```bash
+    # Python 3.6+
+    python -m venv venv && source venv/bin/activate
+    pip install -r requirements.txt
+    ```
+
+2. 配置 config.py
+
+    ```bash
+    DB_NAME=...
+    DB_USER=...
+    DB_PASSWORD=...
+    DB_HOST=...
+    DB_PORT=...
+
+    CONFIG_PATH=incomplete_projects/config/config.py
+    touch $CONFIG_PATH
+    echo database_name = "'$DB_NAME'" >> $CONFIG_PATH
+    echo database_user = "'$DB_USER'" >> $CONFIG_PATH
+    echo database_password = "'$DB_PASSWORD'" >> $CONFIG_PATH
+    echo database_host = "'$DB_HOST'" >> $CONFIG_PATH
+    echo database_port = $DB_PORT >> $CONFIG_PATH
+    echo django_secret_key = "'just-some-random-string'" >> $CONFIG_PATH
+    ```
+
+3. 初始化数据库
+
+    ```sql
+    -- 登录数据库: mysql -u $DB_USER -p$DB_PASSWORD -h $DB_HOST -P $DB_PORT
+    MySQL > CREATE DATABASE IF NOT EXISTS `building`;
+    MySQL > use `building`;
+    MySQL > source backup_db.sql;
+    ```
+
+4. 启动服务（开发模式）
+
+    ```bash
+    python manage.py runserver
+    ```