add json dir for upload analysis

UploadsOnDisk.go

 func (m *uploadsOnDisk) pdfPath() string {
 	return config.UploadsDir.PdfDir + strconv.Itoa(int(m.Upload.Id)) + ".pdf"
 }
+
+func (m *uploadsOnDisk) jsonPath() string {
+	return config.UploadsDir.JsonDir + strconv.Itoa(int(m.Upload.Id)) + ".json"
+}
+
 func (m *uploadsOnDisk) convertExcelToPDF() (e error) {
 	if fileExists(m.pdfPath()) {
 		log.Info("Skip conversion excel to PDF , already exists", m)

config.go

 		ThumbDefault string
 		PdfDir       string
 		PdfDefault   string
+		JsonDir      string
 	}
 	TempDir string
 	Session struct { //TODO: figure what is this intended for
 	//check dir
 	if !fileExists(m.UploadsDir.FileDir) {
 		valid = false
-		log.Fatal("UploadsDir.FileDir is missing ", &m.UploadsDir.PdfDefault)
+		log.Fatal("UploadsDir.FileDir is missing ", m.UploadsDir.FileDir)
 	}
 
 	if !fileExists(m.UploadsDir.JpgDir) {
 		valid = false
-		log.Fatal("UploadsDir.JpgDir is missing ", &m.UploadsDir.PdfDefault)
+		log.Fatal("UploadsDir.JpgDir is missing ", m.UploadsDir.JpgDir)
 	}
 	if !fileExists(m.UploadsDir.ThumbDir) {
 		valid = false
-		log.Fatal("UploadsDir.ThumbDir is missing ", &m.UploadsDir.PdfDefault)
+		log.Fatal("UploadsDir.ThumbDir is missing ", m.UploadsDir.ThumbDir)
 	}
 	if !fileExists(m.UploadsDir.PdfDir) {
 		valid = false
-		log.Fatal("UploadsDir.PdfDir is missing ", &m.UploadsDir.PdfDefault)
+		log.Fatal("UploadsDir.PdfDir is missing ", m.UploadsDir.PdfDir)
+	}
+
+	if !fileExists(m.UploadsDir.JsonDir) {
+		valid = false
+		log.Fatal("UploadsDir.JsonDir is missing ", m.UploadsDir.JsonDir)
 	}
 
 	if !fileExists(m.TempDir) {
 		valid = false
-		log.Fatal("temp Dir is missing ", &m.UploadsDir.PdfDefault)
+		log.Fatal("temp Dir is missing ", m.TempDir)
 	}
 
 	// convert to absolute path : fileDir

config.json

     "ThumbDir": "./uploads/thumb",
     "ThumbDefault": "./assets/thumb_file_icon.webp",
     "PdfDir": "./uploads/pdf",
-    "PdfDefault": "./assets/no_preview.pdf"
+    "PdfDefault": "./assets/no_preview.pdf",
+    "JsonDir": "./uploads/json"
   },
   "TempDir": "./tmp/",
   "Static": [

deploy/config.prod.json

     "ThumbDir": "/var/sfmapi/uploads/thumb",
     "ThumbDefault": "./assets/thumb_file_icon.webp",
     "PdfDir": "/var/sfmapi/uploads/pdf",
-    "PdfDefault": "./assets/no_preview.pdf"
+    "PdfDefault": "./assets/no_preview.pdf",
+    "JsonDir": "/var/sfmapi/uploads/json"
   },
   "TempDir": "/var/sfmapi/tmp/",
   "Static": [