chore: add reference to SourceScan/verification-guide

README.md

@@ -114,7 +114,7 @@ if needed.
 
 ### **reproducible-wasm** variant
 
-This runs a reproducible build in a [Docker](https://docs.docker.com/) container, which:
+This variant runs a reproducible build in a [Docker](https://docs.docker.com/) container, which:
 
 1. runs against source code version, committed to git, ignoring any uncommitted changes
 2. requires that `Cargo.lock` of project is created (e.g. via `cargo update`) and added to git. 
@@ -124,8 +124,11 @@ This runs a reproducible build in a [Docker](https://docs.docker.com/) container
     - default values for this section can also be found in `Cargo.toml` of 
       template project, generated by `cargo near new`
 
+**What's a reproducible build in context of NEAR?**
+Why is it needed? Explanation of these points and a step-by-step tutorial is present at [SourceScan/verification-guide](https://github.com/SourceScan/verification-guide).
+
 <details>
-  <summary>Additional details on possible <code>[package.metadata.near.reproducible_build]</code> configuration</summary><p>
+  <summary>Additional (optional) details on possible <code>[package.metadata.near.reproducible_build]</code> configuration</summary><p>
 
 - available images can be found by this link https://hub.docker.com/r/sourcescan/cargo-near/tags 
   - [`image`](https://github.com/near/cargo-near/blob/main/cargo-near/src/commands/new/new-project-template/Cargo.template.toml#L18) and [`image_digest`](https://github.com/near/cargo-near/blob/main/cargo-near/src/commands/new/new-project-template/Cargo.template.toml#L19) are straightforward to configure: