docs: add contribution guide

CONTRIBUTING.md

@@ -0,0 +1,96 @@
+# Contributing
+
+We would ❤️ for you to contribute to Pingvin Share and help make it better! All contributions are welcome, including issues, suggestions, pull requests and more.
+
+## Getting started
+You've found a bug, have suggestion or something else, just create an issue on GitHub and we can get in touch 😊.
+
+
+## Submit a Pull Request 
+Once you created a issue and you want to create a pull request, follow this guide.
+
+Branch naming convention is as following
+
+`TYPE-ISSUE_ID-DESCRIPTION`
+
+example:
+
+```
+feat-69-ability-to-set-share-expiration-to-never
+```
+
+When `TYPE` can be:
+
+- **feat** - is a new feature
+- **doc** - documentation only changes
+- **fix** - a bug fix
+- **refactor** - code change that neither fixes a bug nor adds a feature
+
+**All PRs must include a commit message with the changes description!**
+
+For the initial start, fork the project and use the `git clone` command to download the repository to your computer. A standard procedure for working on an issue would be to:
+
+1. `git pull`, before creating a new branch, pull the changes from upstream. Your master needs to be up to date.
+
+```
+$ git pull
+```
+
+2. Create new branch from `main` like: `feat-69-ability-to-set-share-expiration-to-never`<br/>
+
+```
+$ git checkout -b [name_of_your_new_branch]
+```
+
+3. Work - commit - repeat
+
+4. Before you push your changes, make sure you run the linter and format the code.
+
+```bash
+npm run lint
+npm run format
+```
+
+5. Push changes to GitHub
+
+```
+$ git push origin [name_of_your_new_branch]
+```
+
+6. Submit your changes for review
+   If you go to your repository on GitHub, you'll see a `Compare & pull request` button. Click on that button.
+7. Start a Pull Request
+   Now submit the pull request and click on `Create pull request`.
+8. Get a code review approval/reject
+
+## Setup project
+
+Pingvin Share consists of a frontend and a backend.
+
+### Backend
+
+The backend is built with [Nest.js](https://nestjs.com) and uses Typescript.
+
+#### Setup
+
+1. Open the `backend` folder
+2. Duplicate the `.env.example` file, rename the duplicate to `.env` and change the environment variables if needed
+3. Install the dependencies with `npm install`
+4. Push the database schema to the database by running `npx prisma db push`
+5. Start the backend with `npm run dev`
+
+### Frontend
+The frontend is built with [Next.js](https://nextjs.org) and uses Typescript.
+
+#### Setup
+1. Start the backend first
+2. Open the `frontend` folder
+3. Duplicate the `.env.example` file, rename the duplicate to `.env` and change the environment variables if needed
+4. Install the dependencies with `npm install`
+5. Start the frontend with `npm run dev`
+
+You're all set!
+
+### Testing
+
+At the moment we only have system tests for the backend. To run these tests, run `npm run test:system` in the backend folder.

README.md

@@ -12,6 +12,7 @@ Demo: https://pingvin-share.dev.eliasschneider.com
 
 - Create a simple share with a link
 - No file size limit, only your disk will be your limit
+- Set a share expiration
 - Optionally secure your share with a visitor limit and a password
 - Dark mode
 
@@ -43,29 +44,4 @@ Just update the docker container by running `docker compose pull && docker compo
 
 ## 🖤 Contribute
 
-You're very welcome to contribute to Pingvin Share!
+You're very welcome to contribute to Pingvin Share! Follow the [contribution guide](/CONTRIBUTING.md) to get started.
-Contact me, create an issue or directly create a pull request.
-
-### Development setup
-
-#### Backend
-
-1. Open the `backend` folder
-2. Duplicate the `.env.example` file, rename the duplicate to `.env` and change the environment variables if needed
-3. Install the dependencies with `npm install`
-4. Push the database schema to the database by running `npx prisma db push`
-5. Start the backend with `npm run dev`
-
-#### Frontend
-
-1. Start the backend first
-2. Open the `frontend` folder
-3. Duplicate the `.env.example` file, rename the duplicate to `.env` and change the environment variables if needed
-4. Install the dependencies with `npm install`
-5. Start the frontend with `npm run dev`
-
-You're all set!
-
-### Testing
-
-At the moment we only have system tests for the backend. To run these tests, run `npm run test:system` in the backend folder.