How to load the third party Library in Envoyfilter with Lua

1

Hello：
When using Lua to extend evoyfilter for development, we need to use the third-party library cjson. I need trouble when executing Lua script. Please help me. Thank you.
My code is as follows：

apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: auth-forward-filter
  namespace: istio-system
spec:
  workloadSelector:
    # select by label in the same namespace
    labels:
      istio: ingressgateway
  configPatches:
    # The Envoy config you want to modify
    - applyTo: HTTP_FILTER
      match:
        context: GATEWAY
        listener:
          filterChain:
            filter:
              name: "envoy.http_connection_manager"
              subFilter:
                name: "envoy.router"
      patch:
        operation: INSERT_BEFORE
        value: # lua filter specification
          name: envoy.lua
          typed_config:
            "@type": "type.googleapis.com/envoy.config.filter.http.lua.v2.Lua"
            inlineCode: |-
              function envoy_on_request(request_handle)
                  local cjson   = require "cjson"

                  -- TODO 过滤白名单
                  local metadata = request_handle:metadata()
                  request_handle:logInfo("metatata: ")
                  request_handle:logInfo(metadata)

                  -- 获取token
                  local token = request_handle:headers():get("Authorization")
                  local path = request_handle:headers():get(":path")

                  local req_body = string.format('{"token": "%s", "path": "%s"}', token, path)
                  -- Make an HTTP call.
                  local headers, body = request_handle:httpCall(
                  "auth_cluster",
                  {
                    [":method"] = "POST",
                    [":path"] = "/api/v1/auth",
                    [":authority"] = "auth_cluster",
                    ["set-cookie"] = { "lang=lua; Path=/", "type=binding; Path=/" },
                    ["Content-Type"] = "application/json",
                  },
                  req_body,
                  5000)

                  request_handle:logInfo("auth response headers: ")
                  request_handle:logInfo(headers)
                  request_handle:logInfo("auth response body: ")
                  request_handle:logInfo(body)

                  local resp_status = headers["status"]
                  if resp_status == 200 then
                      local data = cjson.decode(body)
                      if data["code"] == 10000 then
                          request_handle:headers():add("organiz-id", 12)
                          request_handle:headers():add("user-id", 1)
                          request_handle:headers():remove("Cookie")
                      else
                          request_handle:respond({headers, body})
                      end
                  else
                      request_handle:respond({headers, body})
                  end
                end

However, the following error occurred：

2021-03-04T06:00:44.382809Z	error	envoy lua	script log: [string "function envoy_on_request(request_handle)..."]:2: module 'cjson' not found:
	no field package.preload['cjson']
	no file './cjson.lua'
	no file '/tmp/tmp.OEDvoBtJhK/luajit/share/luajit-2.1.0-beta3/cjson.lua'
	no file '/usr/local/share/lua/5.1/cjson.lua'
	no file '/usr/local/share/lua/5.1/cjson/init.lua'
	no file '/tmp/tmp.OEDvoBtJhK/luajit/share/lua/5.1/cjson.lua'
	no file '/tmp/tmp.OEDvoBtJhK/luajit/share/lua/5.1/cjson/init.lua'
	no file './cjson.so'
	no file '/usr/local/lib/lua/5.1/cjson.so'
	no file '/tmp/tmp.OEDvoBtJhK/luajit/lib/lua/5.1/cjson.so'
	no file '/usr/local/lib/lua/5.1/loadall.so'