New debug mode:

Debug mode is no more triggered by the NODE_ENV value, but by testing
the existance of a file in the plugin data directory.

server/lib/debug.ts

@@ -0,0 +1,19 @@
+import type { RegisterServerOptions } from '@peertube/peertube-types'
+import * as path from 'path'
+import * as fs from 'fs'
+
+export function isDebugMode (options: RegisterServerOptions): boolean {
+  const peertubeHelpers = options.peertubeHelpers
+  const logger = peertubeHelpers.logger
+
+  if (!peertubeHelpers.plugin) {
+    return false
+  }
+  const filepath = path.resolve(peertubeHelpers.plugin.getDataDirectoryPath(), 'debug_mode')
+  logger.debug('Testing debug mode by testing if file exists: ' + filepath)
+  if (fs.existsSync(filepath)) {
+    logger.info('Plugin livechat Debug mode is on.')
+    return true
+  }
+  return false
+}