Replace gunicorn deployment to granian (#705)

* Replace gunicorn deployment to granian

* Update env comments

* Fix the granian env

deploy/backend/fastapi_server.conf

@@ -1,6 +1,6 @@
 [program:fastapi_server]
-directory=/fba
-command=/usr/local/bin/gunicorn -c /fba/deploy/backend/gunicorn.conf.py main:app
+directory=/fba/backend
+command=/usr/local/bin/granian main:app --interface asgi
 user=root
 autostart=true
 autorestart=true

deploy/backend/gunicorn.conf.py

@@ -1,44 +0,0 @@
-# fmt: off
-# 监听内网端口
-bind = '0.0.0.0:8001'
-
-# 工作目录
-chdir = '/fba/backend/'
-
-# 并行工作进程数
-workers = 1
-
-# 监听队列
-backlog = 512
-
-# 超时时间
-timeout = 120
-
-# 设置守护进程,将进程交给 supervisor 管理；如果设置为 True 时，supervisor 启动日志为：
-# gave up: fastapi_server entered FATAL state, too many start retries too quickly
-# 则需要将此改为: False
-daemon = False
-
-# 工作模式协程
-worker_class = 'uvicorn.workers.UvicornWorker'
-
-# 设置最大并发量
-worker_connections = 2000
-
-# 设置进程文件目录
-pidfile = '/var/run/gunicorn.pid'
-
-# 设置访问日志和错误信息日志
-accesslog = '-'
-errorlog = '-'
-
-# 设置这个值为true 才会把打印信息记录到错误日志里
-capture_output = True
-
-# 设置日志记录水平
-loglevel = 'debug'
-
-# python程序
-pythonpath = '/usr/local/lib/python3.10/site-packages'
-
-# 启动 gunicorn -c gunicorn.conf.py main:app