Added winston logging

- use logger.xxx instead of console.xxx
- added express middleware logging (using jsonl)
- added LOG_PATH as environment variable
- more configs postponed for later iteration

packages/server/src/commands/start.ts

@@ -3,6 +3,7 @@ import path from 'path'
 import * as Server from '../index'
 import * as DataSource from '../DataSource'
 import dotenv from 'dotenv'
+import logger from '../utils/logger'
 
 dotenv.config({ path: path.join(__dirname, '..', '..', '.env'), override: true })
 
@@ -25,11 +26,11 @@ export default class Start extends Command {
     }
 
     async stopProcess() {
-        console.info('Shutting down Flowise...')
+        logger.info('Shutting down Flowise...')
         try {
             // Shut down the app after timeout if it ever stuck removing pools
             setTimeout(() => {
-                console.info('Flowise was forced to shut down after 30 secs')
+                logger.info('Flowise was forced to shut down after 30 secs')
                 process.exit(processExitCode)
             }, 30000)
 
@@ -37,7 +38,7 @@ export default class Start extends Command {
             const serverApp = Server.getInstance()
             if (serverApp) await serverApp.stopApp()
         } catch (error) {
-            console.error('There was an error shutting down Flowise...', error)
+            logger.error('There was an error shutting down Flowise...', error)
         }
         process.exit(processExitCode)
     }
@@ -49,7 +50,7 @@ export default class Start extends Command {
         // Prevent throw new Error from crashing the app
         // TODO: Get rid of this and send proper error message to ui
         process.on('uncaughtException', (err) => {
-            console.error('uncaughtException: ', err)
+            logger.error('uncaughtException: ', err)
         })
 
         const { flags } = await this.parse(Start)
@@ -63,11 +64,11 @@ export default class Start extends Command {
 
         await (async () => {
             try {
-                this.log('Starting Flowise...')
+                logger.info('Starting Flowise...')
                 await DataSource.init()
                 await Server.start()
             } catch (error) {
-                console.error('There was an error starting Flowise...', error)
+                logger.error('There was an error starting Flowise...', error)
                 processExitCode = EXIT_CODE.FAILED
                 // @ts-ignore
                 process.emit('SIGINT')