Move old backend code to old_src folder

Signed-off-by: David Mehren <git@herrmehren.de>

old_src/lib/logger.ts

@@ -0,0 +1,20 @@
+import { createLogger, format, transports } from 'winston'
+
+const logger = createLogger({
+  level: 'debug',
+  format: format.combine(
+    format.uncolorize(),
+    format.timestamp(),
+    format.align(),
+    format.splat(),
+    format.printf(info => `${info.timestamp} ${info.level}: ${info.message}`)
+  ),
+  transports: [
+    new transports.Console({
+      handleExceptions: true
+    })
+  ],
+  exitOnError: false
+})
+
+export { logger }