[BUG] Paths for file uploads are hard coded

[graipher]

Describe the bug
Flowise uses a hard coded folder path for some file uploads. This breaks on read-only file systems and cannot be configured.

To Reproduce
Steps to reproduce the behavior:

1. Try to run flowise in a read-only file system
2. See error

Error: EROFS: read-only file system, mkdir
'/usr/local/lib/node_modules/flowise/uploads'
Code: EROFS

Expected behavior
File uploads should respect the storage settings passed in via env variables (ie either BLOB_STORAGE_PATH if using local storage or the S3_* variables).

Setup

• kubernetes (official docker image), read-only file system, S3 storage, Postgres DB
• Flowise Version 2.1.3
• OS: Linux

Additional context
Hardcoded paths are here:

• Flowise/packages/server/src/routes/attachments/index.ts

  Line 8 in d057129

  const upload = multer({ dest: `${path.join(__dirname, '..', '..', '..', 'uploads')}/` })

• Flowise/packages/server/src/routes/openai-assistants-vector-store/index.ts

  Line 7 in d057129

  const upload = multer({ dest: `${path.join(__dirname, '..', '..', '..', 'uploads')}/` })

• Flowise/packages/server/src/routes/predictions/index.ts

  Line 8 in d057129

  const upload = multer({ dest: `${path.join(__dirname, '..', '..', '..', 'uploads')}/` })

And multer will try to create the destination directory if passed as a string and if it does not exist:

Note: You are responsible for creating the directory when providing destination as a function. When passing a string, multer will make sure that the directory is created for you.
https://www.npmjs.com/package/multer#diskstorage

There seems to already be some functionality for getting the right paths elsewhere:

Flowise/packages/server/src/controllers/get-upload-path/index.ts

Line 4 in d057129

const getPathForUploads = async (req: Request, res: Response, next: NextFunction) => {

[HenryHengZJ]

Yep, I think we should definitely change the hard coded multer path to either whatever env variables that was set, if not, default to the hard coded path