Add badges to the readme.

Author: viferga

README.md

@@ -3,10 +3,20 @@
   <h1><b>MetaCall Polyglot Runtime</b></h1></a>
   <a href="https://metacall.io">MetaCall.io</a> |
   <a href="https://github.com/metacall/install">Install</a> |
-  <a href="https://github.com/metacall/core/blob/master/docs/README.md">Docs</a> |
-  <a href="https://t.me/joinchat/BMSVbBatp0Vi4s5l4VgUgg">Telegram</a> |
-  <a href="https://discord.gg/upwP4mwJWa">Discord</a> |
-  <a href="https://matrix.to/#/!wOPPTChTestHdAHEOf:matrix.org">Matrix</a>
+  <a href="https://github.com/metacall/core/blob/master/docs/README.md">Docs</a>
+</div>
+<div align="center">
+  <a href="https://t.me/joinchat/BMSVbBatp0Vi4s5l4VgUgg" alt="Discord">
+    <img src="https://img.shields.io/static/v1?label=metacall&message=join&color=blue&logo=telegram&style=flat" /></a>
+
+  <a href="https://discord.gg/upwP4mwJWa" alt="Discord">
+    <img src="https://img.shields.io/discord/781987805974757426?label=discord&style=flat" /></a>
+
+  <a href="https://matrix.to/#/#metacall:matrix.org" alt="Matrix">
+    <img src="https://img.shields.io/matrix/metacall:matrix.org?label=matrix&style=flat" /></a>
+
+  <a href="https://twitter.com/metacallio" alt="Twitter">
+    <img src="https://img.shields.io/twitter/follow/metacallio?label=MetaCall" /></a>
 
   <a href="https://medium.com/@metacall/call-functions-methods-or-procedures-between-programming-languages-with-metacall-58cfece35d7" target="_blank"><img src="https://raw.githubusercontent.com/metacall/core/master/deploy/images/overview.png" alt="M E T A C A L L" style="max-width:100%; margin: 0 auto;" width="350" height="auto"></a>
 </div>
@@ -26,5 +36,10 @@ const { sum } = require('sum.py');
 sum(3, 4); // 7
 ```
 
+`shell`
+``` sh
+metacall main.js
+```
+
 **MetaCall** is an extensible, embeddable and interoperable polyglot runtime. It supports NodeJS, Vanilla JavaScript, TypeScript, Python, Ruby, C#, Go, C, C++, Rust, D, Cobol [and more](https://github.com/metacall/core/blob/master/docs/README.md#2-language-support). Use the [installer](https://github.com/metacall/install) and try [some examples](https://github.com/metacall/beautifulsoup-express-example).