Added Codespaces button inside Contributing.md and used prek instead of pre-commit

Author: suiiibhit

.devcontainer/devcontainer.json

@@ -5,5 +5,5 @@
     "dockerfile": "../Dockerfile"
   },
   "runArgs": ["--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined"],
-  "onCreateCommand": "pip install -e . -r requirements-test.txt -r requirements-extra.txt && pre-commit install"
+  "onCreateCommand": "pip install -e . -r requirements-test.txt -r requirements-extra.txt && prek install"
 }

CONTRIBUTING.md

@@ -15,11 +15,14 @@ You can also search this project for issues with the following labels:
 
 ### GitHub Codespaces
 
-The repository ships with a dev container configuration, so the easiest way
-to get started is [GitHub Codespaces](https://github.com/features/codespaces).
-Open the repo on GitHub, click **Code → Codespaces → New codespace**, and wait
-for the container to build. Once it's ready, all dependencies will be installed
-and pre-commit hooks will be configured automatically.
+The repository ships with a dev container configuration that works with
+[GitHub Codespaces](https://github.com/features/codespaces). You can open
+a ready-to-use environment directly:
+
+[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/bloomberg/pystack)
+
+Once the codespace is ready, all dependencies will be installed and hooks
+will be configured automatically.
 
 Note that the dev container is built from the project's `Dockerfile`, which
 compiles `elfutils` from source, so the first build takes a few minutes.
@@ -39,7 +42,7 @@ cd pystack
 python3 -m venv ../pystack-env/
 source ../pystack-env/bin/activate
 pip install -e . -r requirements-test.txt -r requirements-extra.txt
-pre-commit install
+prek install
 ```
 
 ## Contribution Licensing