Move old backend code to old_src folder

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

old_src/lib/web/imageRouter/filesystem.ts

@@ -0,0 +1,24 @@
+import path from 'path'
+import { URL } from 'url'
+
+import { config } from '../../config'
+import { logger } from '../../logger'
+import { UploadProvider } from './index'
+
+const FilesystemUploadProvider: UploadProvider = {
+  uploadImage: (imagePath, callback) => {
+    if (!callback || typeof callback !== 'function') {
+      logger.error('Callback has to be a function')
+      return
+    }
+
+    if (!imagePath) {
+      callback(new Error('Image path is missing or wrong'), undefined)
+      return
+    }
+
+    callback(undefined, (new URL(path.basename(imagePath), config.serverURL + '/uploads/')).href)
+  }
+}
+
+export { FilesystemUploadProvider }