Updated Building binary (markdown)

Building-binary.md

@@ -1,9 +1,17 @@
+---
+> :information_source: **NOTE:** The (**MSRV**) Minimum Support Rust Version policy is **N-2**, which means that if the current Rust version is **v1.67**, we support building with **v1.65**, and when **v1.69** is stable, the MSRV would be **v1.67**.<br>
+That means that new Rust features which come to stable can not be used once a new stable has been released, but have to wait for two more releases.<br>
+To be sure you are using the stable version we strongly suggest to use [rustup](https://rustup.rs/) which makes installing and updating Rust very easy.<br>
+Any version below the MSRV will generate a warning, and you are on your own when forcing to build with an older version.
+---
+
 This page is primarily for those interested in vaultwarden development, or who have a specific reason for wanting to build their own binary.
 
 Typical users should either [[deploy via Docker|Which-container-image-to-use]], [[extract the pre-built binaries|Pre-built binaries]] from the Alpine-based Docker images, or look for a [[third-party package|Third-party-packages]].
 
 ## Dependencies
-- `Rust stable` (strongly recommended to use [rustup](https://rustup.rs/))
+- `Rust stable` (strongly recommended to use [rustup](https://rustup.rs/))<br>
+  :warning: The (MSRV) minimum support Rust version is **N-2**, which means that if the current Rust version is **v1.67**, we support building with **v1.65**.<br>
 - On a Debian based distro some general packages to make sure building should go fine install the following: `build-essential`, `git`
 - `OpenSSL` (should be available in path, see [openssl crate docs](https://docs.rs/openssl/latest/openssl/#automatic))
   On a Debian based distro, you need to install `pkg-config` and `libssl-dev`