Index and search xlsx file content based on tantivy
``` POST http://localhost:8080/index { "file_path": "/home/nordine/test.xlsx" }
```
GET http://localhost:8080/search?page=0&per_page=10&q=sango&query_type=regexQuery
| env | default value |
| ------------------------------ | ----------------------------------- |
| SERVICECOLLECTIONNAME | file-search |
| SERVICEHOST | 0.0.0.0 |
| SERVICEPORT | 8080 |
| INDEXDIRPATH | /tmp/__tantivy_data
|
| RUST_LOG | N/A |