docs: update contributing info

CONTRIBUTING.md

@@ -0,0 +1,49 @@
+# Development
+
+To get started with working on the codebase, use the following steps prepare your local environment:
+
+```bash
+# clone the github repo and navigate into the folder
+git clone https://github.com/ApeWorX/evmchains.git
+cd evmchains
+
+# create and load a virtual environment
+python3 -m venv venv
+source venv/bin/activate
+
+# install evmchains into the virtual environment
+python setup.py install
+
+# install the developer dependencies (-e is interactive mode)
+pip install -e .'[dev]'
+```
+
+## Pre-Commit Hooks
+
+We use [`pre-commit`](https://pre-commit.com/) hooks to simplify linting and ensure consistent formatting among contributors.
+Use of `pre-commit` is not a requirement, but is highly recommended.
+
+Install `pre-commit` locally from the root folder:
+
+```bash
+pip install pre-commit
+pre-commit install
+```
+
+Committing will now automatically run the local hooks and ensure that your commit passes all lint checks.
+
+## Pull Requests
+
+Pull requests are welcomed! Please adhere to the following:
+
+- Ensure your pull request passes our linting checks
+- Include test cases for any new functionality
+- Include any relevant documentation updates
+
+It's a good idea to make pull requests early on.
+A pull request represents the start of a discussion, and doesn't necessarily need to be the final, finished submission.
+
+If you are opening a work-in-progress pull request to verify that it passes CI tests, please consider
+[marking it as a draft](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/about-pull-requests#draft-pull-requests).
+
+Join the ApeWorX [Discord](https://discord.gg/apeworx) if you have any questions.

README.md

@@ -42,3 +42,13 @@ assert chain.chainId == 1
 
 Please see the [contributing guide](CONTRIBUTING.md) to learn more how to contribute to this project.
 Comments, questions, criticisms and pull requests are welcomed.
+
+### Adding Chains
+
+To add a chain to the metadata, please open a pull request with the following changes:
+
+- Update `CHAIN_IDS` in `scripts/update.py` with the chain IDs you want to add
+- Run `python scripts/update.py`
+- Submit a PR with the updated script and updated `evmchain/chains.py` metdata file
+
+**Do not edit `evmchain/chains.py` manually.** Any manual changes are likely to be overwritten later.

scripts/update.py

@@ -128,7 +128,7 @@ def fetch_chains() -> Dict[str, Dict[str, Chain]]:
 
 def write_chain_const(chains: Dict[str, Dict[str, Chain]]):
     """Write the file with Python constant"""
-    file_str = "# This file is auto-generated by scripts/update_rpc.py\n"
+    file_str = "# This file is auto-generated by scripts/update.py\n"
     file_str += f"# {stamp()}\n"
     file_str += "# Do not edit this file directly.\n"
     file_str += "from typing import Any, Dict\n\n"