Unable to start service

[mmahacek]

Following the instructions in the readme, I get an error when I try to start the service:

[root@HOSTNAME Squadcast-Webhook-Connectors]# nodemon start
[nodemon] 3.0.1
[nodemon] to restart at any time, enter `rs`
[nodemon] watching path(s): *.*
[nodemon] watching extensions: js,mjs,cjs,json
[nodemon] starting `node start server.js`
node:internal/modules/cjs/loader:1080
  throw err;
  ^

Error: Cannot find module 'express'
Require stack:
- /opt/Squadcast-Webhook-Connectors/server.js
    at Module._resolveFilename (node:internal/modules/cjs/loader:1077:15)
    at Module._load (node:internal/modules/cjs/loader:922:27)
    at Module.require (node:internal/modules/cjs/loader:1143:19)
    at require (node:internal/modules/cjs/helpers:119:18)
    at Object.<anonymous> (/opt/Squadcast-Webhook-Connectors/server.js:2:17)
    at Module._compile (node:internal/modules/cjs/loader:1256:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
    at Module.load (node:internal/modules/cjs/loader:1119:32)
    at Module._load (node:internal/modules/cjs/loader:960:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:86:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ '/opt/Squadcast-Webhook-Connectors/server.js' ]
}

Node.js v18.18.0
[nodemon] app crashed - waiting for file changes before starting...