* Fix only one file upload for Haystack UI
When using Haystack UI and streamlit, the default behavior is to upload one file at at time and override the file you have already uploaded. Streamlit now supports uploading multiple files and may be more intuitive for users of Haystack to use it as the default behavior.
Return type for `st.sidebar.file_uploader` when `accept_multiple_files=True` is a list of the files and empty if no files are provided
* Update requirements.txt
* Update requirements.txt
Co-authored-by: Malte Pietsch <malte.pietsch@deepset.ai>
* first running version of eval mode
* restructuring, new naming of elements and testing
* add new files to Docker, how to start with Haystack reference, remove not needed dependencies
* Add latest docstring and tutorial changes
* merged changes
* fixing bugs after breaking changes from last release
* newser version of states in streamlit, more docs for eval mode, eval file as env virable
* eval file as env variable
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
