Event-Q&A

Self-hosted Q&A and discussion companion for events and conferences.

Event-Q&A displays the program of an event (tracks, talks, rooms, speakers) and lets attendees ask and discuss questions per talk, browse other attendees, and exchange direct messages. To run an event, the admin writes a single event.yaml describing the schedule and launches the tool on a server. Participants connect from any device using a self-chosen alias.

Features

• Schedule view — timeline grid on desktop, chronological list on mobile, grouped by track and day.
• Per-talk Q&A — attendees post questions, upvote them, and discuss in a flat chatroom under each question.
• Direct messages — simple two-party chat between any two attendees.
• Lightweight auth — claim an alias on first visit; optional password to protect it across devices.
• Admin moderation — hide questions/messages, mark questions as answered, ban or rename users.
• Realtime updates — new questions, votes, replies and DMs arrive over WebSocket without reload.
• Dark mode — follows OS preference, with a per-user override.
• Single config file — everything (schedule, rooms, speakers, admins) lives in one event.yaml.
• Single container — backend, frontend and SQLite are served by one Docker image; one mounted volume holds all state.

Quick start

Requires Docker and Docker Compose.

# 1. Clone the repo and copy the example config
git clone https://github.com/c4dt/event-qa.git
cd event-qa
cp event.example.yaml event.yaml
$EDITOR event.yaml

# 2. Start the stack
docker compose up -d

# 3. Put a TLS-terminating proxy (traefik, Caddy, nginx) in front of
#    port 3000.

The server listens on port 3000 and stores state in ./data (event.yaml and the SQLite database).

To generate an argon2id password hash for an admin entry:

docker run --rm -it ghcr.io/c4dt/event-qa hash-password

Configuration

The admin maintains a single yaml file, event.yaml, mounted into the container at /data/event.yaml. A minimal example:

event:
  name: "My Conference 2026"
  place: "EPFL, Lausanne"
  start: 2026-06-01
  end:   2026-06-02
  info: |
    Welcome to the conference. Wi-Fi: guest / hunter2.

rooms:
  - id: main
    name: "Main Hall"
    description: "Ground floor, capacity 300"
  - id: bh1
    name: "Breakout 1"

speakers:
  - id: ada
    name: "Ada Lovelace"
    bio: "Mathematician, programmer."

admins:
  - alias: admin
    password: "$argon2id$..."   # see "Quick start" for how to hash

tracks:
  - id: main-track
    name: "Main Track"
    talks:
      - id: opening
        title: "Opening keynote"
        start: 2026-06-01T09:00:00+02:00
        duration_min: 45
        speakers: [ada]
        room: main
        # qa: true     # optional, default true. Set to false for breaks/socials.

      - id: lunch
        type: slot      # non-talk entry: no speaker, no Q&A
        title: "Lunch"
        start: 2026-06-01T12:00:00+02:00
        duration_min: 90
        room: main

The config is loaded once at server startup; to change it, edit the file and restart the container. The full schema and validation rules are documented in TECHNICAL.md.

A complete sample is available at event.example.yaml.

Development

All tooling (Node, pnpm, sqlite, argon2 CLI) is pinned via devbox — do not rely on system-installed Node or pnpm.

# Enter the devbox shell
devbox shell

# Install workspace dependencies
pnpm install

# Run backend (:3000) and frontend (:5173) dev servers
pnpm dev

# Run tests (red/green TDD)
pnpm test

Outside the devbox shell, prepend every command with devbox run --. See TECHNICAL.md for more details on the toolchain, the repository layout, and the test strategy.

Documentation

• USER_GUIDE.md — what attendees and admins see and do (login, schedule, Q&A, DMs, moderation).
• TECHNICAL.md — architecture, data model, HTTP and WebSocket APIs, deployment, security notes.
• event.example.yaml — annotated config sample.

Tech stack

Layer	Choice
Backend	Node.js (>=20) + Express + TypeScript
Realtime	WebSockets via ws
Frontend	SvelteKit + TypeScript + Tailwind CSS
Persistence	SQLite via better-sqlite3
Passwords	argon2 (argon2id)
Config	YAML (js-yaml) validated with zod
Container	Single multi-stage Dockerfile, run via docker-compose
Tests	vitest for both backend and frontend

Contributing

Issues and pull requests are welcome. Before opening a PR:

• Read TECHNICAL.md to understand the architecture.
• Run pnpm lint and pnpm test from the devbox shell.
• For backend logic (auth, rate limiting, admin actions), follow red/green TDD: write the failing test first, then the code.

License

Licensed under the GNU Affero General Public License v3.0 or later (AGPL-3.0-or-later). See LICENSE for the full text.