add new back

server/routers/procurement/routes/buy.js

@@ -1,9 +1,10 @@
 const express = require('express')
 const fs = require('fs')
+const path = require('path')
 const router = express.Router()
 
 // Create remote-assets/docs directory if it doesn't exist
-const docsDir = '../../remote-assets/docs'
+const docsDir = path.join(__dirname, '../../remote-assets/docs')
 if (!fs.existsSync(docsDir)) {
   fs.mkdirSync(docsDir, { recursive: true })
 }
@@ -47,7 +48,7 @@ router.post('/docs', (req, res) => {
   // Save file to disk
   try {
     const binaryData = Buffer.from(fileData, 'base64')
-    const filePath = `${docsDir}/${id}.${type}`
+    const filePath = path.join(docsDir, `${id}.${type}`)
     fs.writeFileSync(filePath, binaryData)
     console.log(`[BUY API] File saved to ${filePath}, size: ${binaryData.length} bytes`)
     
@@ -150,7 +151,7 @@ router.get('/docs/:id/file', (req, res) => {
     return res.status(404).json({ error: 'Document not found' })
   }
   
-  const filePath = `${docsDir}/${id}.${doc.type}`
+  const filePath = path.join(docsDir, `${id}.${doc.type}`)
   if (!fs.existsSync(filePath)) {
     console.log('[BUY API] File not found on disk:', filePath)
     return res.status(404).json({ error: 'File not found on disk' })