Update PMG banner (#138)

* update pmg banner

* rm width

* trial: rm lines

* trial: add line above demo

* trial: add thin line above demo

* trial: add thin line above demo

* trial: add thin line below demo

* trial: rm lines

* trial: add br

* trial: replace images with badges

* trial: replace h1 with h3

* trial: increase pmg height

* revert back to h1

* trial: change theme for demo

* trial: use lighter bg for demo

* trial: use lighter bg for demo

* trial: use lighter bg for demo & rm extra div

* revert demo back to original

* add private package limitation in non-proxy mode

* update demos

README.md

@@ -1,5 +1,5 @@
 <div align="center">
-    <img src="./docs/assets/pmg-github-banner.png" width="900" alt="PMG GitHub Banner">
+    <img src="./docs/assets/pmg-banner.png" alt="PMG GitHub Banner">
 </div>
 <br/>
 
@@ -9,11 +9,9 @@
 
 <div align="center">
 
-<a href="https://docs.safedep.io/pmg/quickstart"><img src="https://img.shields.io/badge/Docs-docs.safedep.io-2b9246?style=for-the-badge&logo=gitbook&logoColor=white" alt="Docs"></a>
-<a href="https://safedep.io"><img src="https://img.shields.io/badge/Website-safedep.io-3b82f6?style=for-the-badge&logoColor=white" alt="Website"></a>
-
-<a href="https://discord.gg/kAGEj25dCn"><img src="https://img.shields.io/discord/1090352019379851304?style=for-the-badge&logo=discord&logoColor=white&color=5865F2" alt="Discord"></a>
-
+[![Docs](https://img.shields.io/badge/Docs-docs.safedep.io-2b9246?style=flat-square)](https://docs.safedep.io/pmg/quickstart)
+[![Website](https://img.shields.io/badge/Website-safedep.io-3b82f6?style=flat-square)](https://safedep.io)
+[![Discord](https://img.shields.io/discord/1090352019379851304?style=flat-square)](https://discord.gg/kAGEj25dCn)
 
 [![Go Report Card](https://goreportcard.com/badge/github.com/safedep/pmg)](https://goreportcard.com/report/github.com/safedep/pmg)
 ![License](https://img.shields.io/github/license/safedep/pmg)
@@ -23,14 +21,14 @@
 
 </div>
 
----
-
 <div align="center">
-<h3>PMG protects developers from getting compromised by malicious packages.
-See <a href="https://safedep.io/malicious-npm-package-express-cookie-parser/">example</a></h3>
+  <h3>
+    PMG protects developers from getting compromised by malicious packages.<br/>
+    See <a href="https://safedep.io/malicious-npm-package-express-cookie-parser/">example</a>
+  </h3>
 </div>
 
----
+<br>
 
 <img src="./docs/demo/pmg-intro.gif" width="800" alt="pmg in action">
 
@@ -261,6 +259,15 @@ Refer to [CONTRIBUTING.md](CONTRIBUTING.md)
 
 ## Limitations
 
+<details>
+<summary>Private package artifacts inaccessible in non-proxy mode</summary>
+
+If `pmg` is unable to retrieve the private package’s artifacts (files, metadata, etc.), it cannot proceed with dependency tree analysis. This is a limitation of non-proxy mode, where `pmg` is responsible for resolving dependencies and cannot resolve transitive dependencies for private (non-accessible) packages.
+
+With **Proxy Mode enabled**, this limitation **does not** apply—transitive dependencies are analyzed as long as they originate from public registries.
+
+</details>
+
 <details>
 <summary>Approximate dependency version resolution</summary>