docs: nix is now the default way for docs build

docs/src/docs_setup.md

@@ -1,40 +1,16 @@
 # Installation and setup
 
-To render this document locally in your browser do (this should be done only
-once to install `mdbook`):
-
-1. [Install Rust](https://doc.rust-lang.org/cargo/getting-started/installation.html)
-2. With cargo install mdbook and used processors
-   ```sh
-   cargo install mdbook --git https://github.com/igordejanovic/mdBook.git --branch merged-prs
-   cargo install mdbook-admonish
-   cargo install mdbook-bib
-   cargo install mdbook-theme
-   cargo install mdbook-plantuml
-   cargo install mdbook-graphviz
-   cargo install mdbook-linkcheck
-   ```
-
-Optional:
-
-1. For pdf output:
-   ```sh
-   cargo install mdbook-pdf
-   ```
-
-2. For pdf outline support see [this](https://github.com/HollowMan6/mdbook-pdf/issues/1#issuecomment-1366157949):
-   ```sh
-   pip install --user mdbook-pdf-outline
-   ```
-
-In the root of the `docs` directory run `mdbook serve`. The book will be available
-at [http://localhost:3000/]()
-
-# Setup using Nix Flakes
-
-Alternatively, you can use [Nix package manager](https://nixos.org/) to setup
-documentation locally. Instead of the above steps just install Nix, [enable
-flakes](https://nixos.wiki/wiki/flakes), and from the root of the project run:
+Rustemo uses [Nix package manager](https://nixos.org/) to setup reproducible
+documentation development environment locally.
+
+1. [Install Nix](https://nixos.org/download/)
+2. [Enable flakes](https://nixos.wiki/wiki/flakes)
+
+```
+echo "experimental-features = nix-command flakes" >> ~/.config/nix/nix.conf
+```
+
+3. From the root of the project run:
 
 ```
 nix develop
@@ -62,9 +38,9 @@ See [this part of the manual](https://rust-lang.github.io/mdBook/format/mdbook.h
 
 See [this](https://users.rust-lang.org/t/mdbook-how-to-use-cross-references/83713) on how to reference to other section of the document.
 
-# Bibliography
+<!-- # Bibliography -->
 
-Uses [mdbook-bib](https://github.com/francisco-perez-sorrosal/mdbook-bib) to reference books, papers etc.
+<!-- Uses [mdbook-bib](https://github.com/francisco-perez-sorrosal/mdbook-bib) to reference books, papers etc. -->
 
 # Diagrams