Merge pull request fedimint#4782 from star-gazer111/master

Changed Nix installer to DeterminateSystems to avoid enabling flakes

README.md

@@ -65,7 +65,7 @@ Fedimint is a Rust project and uses the [Nix package manager](https://nixos.org/
 Fedimint's developer environment and rust build pipeline is managed through Nix flakebox (https://github.com/rustshop/flakebox). To get started, install Nix.
 
 ```bash
-sh <(curl -L https://nixos.org/nix/install) --daemon
+curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install
 ```
 
 Then fork and clone the Fedimint repo.
@@ -91,4 +91,4 @@ You can then interact with the guardians and lightning gateway through the mproc
 If you want to run with UIs, see the [UI](https://github.com/fedimint/ui) repo for developer environment instructions.
 
 # Contributing
-For contribution guidelines, Areas of contributions and how to get involved, please refer to the [Contributing Guidelines](CONTRIBUTING.md).
+For contribution guidelines, Areas of contributions and how to get involved, please refer to the [Contributing Guidelines](CONTRIBUTING.md).