Added readme for future me

README.md

@@ -0,0 +1,88 @@
+# Sailing Forms
+
+A self-hosted Flask-based custom signup application for managing sailing event registrations. It provides dynamically generated registration forms based on a YAML configuration and automatically saves submitted data to Google Sheets. 
+
+## Features
+
+- **Dynamic Event Forms**: Simply define new events in `events.yaml` without touching the code. Each event gets a clean URL based on its slug (e.g., `domain.com/zomeravond`).
+- **Google Sheets Integration**: Automatically appends participant details to specific Google Sheet tabs in real-time.
+- **Public Participant Lists**: Securely displays public-safe participant data (e.g., class, sail number, boat name) at the bottom of the registration page, while keeping sensitive info (email, phone) private.
+- **CSRF Protection**: Form submissions are protected against Cross-Site Request Forgery.
+- **Dockerized Base**: Includes a `Dockerfile` and `docker-compose.yaml` utilizing `gunicorn` for simple and reliable production deployments.
+
+## Prerequisites
+
+- **Python 3.9+** (if running locally)
+- **Docker and Docker Compose** (if deploying via containers)
+- **Google Service Account**: You need a `credentials.json` file authorized for the Google Sheets API. 
+
+## Setup & Configuration
+
+### 1. Credentials
+Place your Google Service Account credentials inside a file named `credentials.json` in the root of the project. This is required for the application to access the Google Sheets via the `gspread` library.
+
+### 2. Environment Variables
+Create a `.env` file in the root directory and add a secure, random string to be used as your Flask session secret key. This is required for CSRF protection and session management.
+
+```env
+SECRET_KEY=your_very_secret_random_string_here
+```
+
+### 3. Events Configuration (`events.yaml`)
+Define your sailing events in `events.yaml`. You can set a global `master_sheet_id` or specific `sheet_id` for each event. The `tab_name` specifies which worksheet inside the Google Sheet the data should append to.
+
+```yaml
+master_sheet_id: "your_spreadsheet_id_here" # From the Google Sheets URL
+
+events:
+  zomeravond: # The URL slug
+    title: "Zomeravondregatta 2026"
+    tab_name: "Zomeravond 2026"  # Exact tab name in Google Sheets
+    description: "De gezelligste avondwedstrijd van het jaar."
+```
+
+## Running the Application
+
+### Option A: Using Docker (Recommended for Production)
+
+The easiest way to run the service is using Docker Compose. The `docker-compose.yaml` is configured to mount your configuration and credentials without rebuilding the container.
+
+```bash
+docker-compose up -d --build
+```
+The application will run on port `5000` (mapped to `localhost:5000`). Make sure your `credentials.json`, `.env` and `events.yaml` files are in the same directory as the `docker-compose.yaml` file so they are correctly mounted into the container as volumes.
+
+### Option B: Local Development
+
+If you're making changes to the codebase and need to run it directly:
+
+1. Create a virtual environment and activate it:
+   ```bash
+   python -m venv .venv
+   source .venv/bin/activate
+   ```
+2. Install the required dependencies:
+   ```bash
+   pip install -r requirements.txt
+   ```
+3. Run the development server:
+   ```bash
+   python app.py
+   ```
+
+## Automated Testing
+
+The project uses `pytest` for unit and E2E testing (located in the `tests/` directory). 
+
+To run the tests locally:
+```bash
+pytest
+```
+*Note: The testing suite automatically bypasses the need for a real `SECRET_KEY` and passes `TESTING_NO_APPEND=1` to prevent test submissions from cluttering the live Google Sheets.*
+
+## Tech Stack Overview
+
+- **Backend Context:** Flask (Web Framework), Gunicorn (Production WSGI server)
+- **Google Sheets Integration:** `gspread`
+- **Data Configuration:** `PyYAML`
+- **Frontend Context:** Rendered via standard Jinja2 `templates/` (HTML)