Information can be found at 
* https://programmingpercy.tech/blog/learn-how-to-use-neovim-as-ide/
* https://github.com/hrsh7th/
* https://github.com/wbthomason/packer.nvim
* https://docs.rockylinux.org/books/nvchad/nvchad_ui/nvimtree/

Note: According to the first link it is required to clone the packer stuff locally.
This is done on MacOS and Windows in a slightly different way. Consult https://github.com/wbthomason/packer.nvim#quickstart on details.

Hint: On Unix use

    git clone --depth 1 https://github.com/wbthomason/packer.nvim\
       ~/.local/share/nvim/site/pack/packer/start/packer.nvim


At first start there will be error messages. Ignore them, run ':PackerInstall' and quit and restart nvim.


Install nvim on Debian from source:

    git clone https://github.com/neovim/neovim
    sudo apt install ninja-build gettext cmake unzip curl
    make CMAKE_BUILD_TYPE=Release
    sudo make install