documentation: update readme (#92)

* update readme

* make tg badge blue

* lowercase badge titles

* lowercase license

* typo

Author: ncitron

README.md

@@ -1,5 +1,5 @@
 ## Helios
-[![build](https://github.com/a16z/helios/actions/workflows/test.yml/badge.svg)](https://github.com/a16z/helios/actions/workflows/test.yml) [![License: MIT](https://img.shields.io/badge/License-MIT-brightgreen.svg)](https://opensource.org/licenses/MIT)
+[![build](https://github.com/a16z/helios/actions/workflows/test.yml/badge.svg)](https://github.com/a16z/helios/actions/workflows/test.yml) [![license: MIT](https://img.shields.io/badge/license-MIT-brightgreen.svg)](https://opensource.org/licenses/MIT) [![chat](https://img.shields.io/badge/chat-telegram-blue)](https://t.me/+IntDY_gZJSRkNTJj)
 
 Helios is a fully trustless, efficient, and portable Ethereum light client written in Rust.
 
@@ -21,6 +21,9 @@ helios --execution-rpc $ETH_RPC_URL
 ```
 Helios will now run a local RPC server at `http://127.0.0.1:8545`.
 
+### Warning
+Helios is still experimental software. While we hope you try it out, we do not suggest adding it as your main RPC in wallets yet. Sending high-value transactions from a wallet connected to Helios is discouraged.
+
 ### Additional Options
 `--consensus-rpc` or `-c` can be used to set a custom consensus layer rpc endpoint. This must be a consenus node that supports the light client beaconchain api. We recomment using Nimbus for this. If no consensus rpc is supplied, it defaults to `https://www.lightclientdata.org` which is run by us.
 
@@ -82,3 +85,9 @@ async fn main() -> Result<()> {
 
 ## Contributing
 All contributions to Helios are welcome. Before opening a PR, please submit an issue detailing the bug or feature. When opening a PR, please ensure that your contribution builds on the nightly rust toolchain, has been linted with `cargo fmt`, and contains tests when applicable.
+
+## Telegram
+If you are having trouble with Helios or are considering contributing, feel free to join our telegram [here](https://t.me/+IntDY_gZJSRkNTJj).
+
+## Disclaimer
+This code is being provided as is. No guarantee, representation or warranty is being made, express or implied, as to the safety or correctness of the code. It has not been audited and as such there can be no assurance it will work as intended, and users may experience delays, failures, errors, omissions or loss of transmitted information. Nothing in this repo should be construed as investment advice or legal advice for any particular facts or circumstances and is not meant to replace competent counsel. It is strongly advised for you to contact a reputable attorney in your jurisdiction for any questions or concerns with respect thereto. a16z is not liable for any use of the foregoing, and users should proceed with caution and use at their own risk. See a16z.com/disclosures for more info.