antiwork / gumroad

See what sticks. 
 Gumroad is an e-commerce platform that enables creators to sell products directly to consumers. This repository contains the source code for the Gumroad web application.
## Contributing
We don't run an inbound review queue on this repo. To contribute a change: **fork the repo, open the pull request on your own fork, then email support@gumroad.com with a link to it.** We read every submission and merge the ones we want on our side, keeping your authorship — though we can't promise a reply to each one or a timeline.
Your PR still has to meet the same bar as our own work — visual evidence for anything user-facing, QA steps, test results, and an AI disclosure naming the model. See CONTRIBUTING.md for the full guidelines and the substitutions that apply when working from a fork.
## Table of Contents
- Contributing
- Getting Started
 - Prerequisites
 - Installation
 - Configuration
 - Running Locally
- Testing
 - Dependencies
 - Integration tests
- Development
 - Logging in
 - Resetting Elasticsearch indices
 - Push Notifications
 - Common Development Tasks
 - Linting
## Getting Started
### Prerequisites
> 💡 If you're on Windows, follow our Windows setup guide instead.
Before you begin, ensure you have the following installed:
#### Ruby
- https://www.ruby-lang.org/en/documentation/installation/
- Install the version listed in the .ruby-version file
#### Node.js
- https://nodejs.org/en/download
- Install the version listed in the .node-version file
#### Docker
We use Docker to setup the services for development environment.
- For MacOS: Download the Docker app from the Docker website
- For Linux:
 [code] 
#### MySQL & Percona Toolkit
Install a local version of MySQL 8.4.x to match the version running in production.
The local version of MySQL is a dependency of the Ruby `mysql2` gem. You do not need to start an instance of the MySQL service locally. The app will connect to a MySQL instance running in the Docker container.
- For MacOS:
 [code] 
- For Linux:
 - MySQL:
 - https://dev.mysql.com/doc/refman/8.4/en/linux-installation.html
 - `apt install libmysqlclient-dev`
 - Percona Toolkit: https://www.percona.com/doc/percona-toolkit/LATEST/installation.html
#### ImageMagick
We use `imagemagick` for preview editing.
- For MacOS: `brew install imagemagick`
- For Linux: `sudo apt-get install imagemagick`
#### FFmpeg
We use `ffprobe` that comes with `FFmpeg` package to fetch metadata from video files.
- For MacOS: `brew install ffmpeg`
- For Linux: `sudo apt-get install ffmpeg`
#### PDFtk
We use pdftk to stamp PDF files with the Gumroad logo and the buyers' emails.
- For MacOS: Download from here
 - **Note:** pdftk may be blocked by Apple's firewall. If this happens, go to Settings > Privacy & Security and click "Open Anyways" to allow the installation.
- For Linux: `sudo apt-get install pdftk`
#### wkhtmltopdf
While generating invoices, to convert HTML to PDF, PDFKit expects wkhtmltopdf to be installed on your system. Download and install th