enforce pnpm a bit more

.gitignore

@@ -3,3 +3,5 @@ dist/
 .idea/
 node_modules/
 .vscode/
+package-lock.json
+yarn.lock

CONTRIBUTING.md

@@ -2,19 +2,20 @@
 
 Shareon welcomes contributions and corrections. Before contributing, please make sure you have read the guidelines below. If you decide to contribute anything, please follow the steps below.
 
-0. Install [pre-commit](https://pre-commit.com/)
-1. Fork this repository
-2. Clone the fork
-3. Enable pre-commit in the repo:
+0. Install [pnpm](https://pnpm.io/installation):
+1. Install [pre-commit](https://pre-commit.com/)
+2. Fork this repository
+3. Clone the fork
+4. Enable pre-commit in the repo:
 
    ```sh
    pre-commit install
    ```
 
-4. Create a new branch from the latest commit on `main`
-5. Start hacking on the new branch
-6. Commit and push to the new branch
-7. Make a pull request to `main`
+5. Create a new branch from the latest commit on `main`
+6. Start hacking on the new branch
+7. Commit and push to the new branch
+8. Make a pull request to `main`
 
 ## Table of contents