docs: remove unused login video iframe and add signup/login links to Chapter 2 (Getting Started) (#490)

* docs: add sign-up/sign-in images and clickable links to Chapter 2 Getting Started

* fix(netlify): set Node 18 for Netlify builds

* fix(netlify): pin supported Node LTS for Netlify builds

* fix: images view

* revert netlify.toml changes

* Fix formatting in netlify.toml

* revert: restore netlify.toml to master branch version

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* Final fixes

---------

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: Yana-do-code

docs/chapter2/1gettingstarted.md

@@ -18,14 +18,17 @@ While a user can browse through the CircuitVerse contributions and build circuit
 
 CircuitVerse platform supports Google, Facebook, and GitHub sign-in secure authentication systems to reduce the burden of login for the users. Users can get started by signing in with their Google, Facebook, or GitHub Account, or creating a user account using their preferred email address.
 
-<div>
+You can create an account at: [https://circuitverse.org/users/sign_up]
+<!--<div>
   <iframe>insert video for user account login</iframe>
-</div>
+</div>-->
 
 ## Login to CircuitVerse User Account
 
 After successfully logging in to the CircuitVerse platform, a user receives different options to manage their circuit simulation projects within CircuitVerse (refer Figure 2.1). Table 2.1 provides a brief description of the available options.
 
+You can login to your account at: [https://circuitverse.org/users/sign_in]
+
 ![drawing](/img/img_chapter2/2.1.png)
 
 <div align="center">
@@ -73,4 +76,4 @@ After successfully logging in to the CircuitVerse platform, a user receives diff
       </ul>
     </td>
   </tr>
-</table>
+</table>