Deploy Cap with Docker
Cap is a lightweight, modern open-source CAPTCHA alternative that uses SHA-256 proof-of-work. It's fast, private, and extremely simple to integrate. With Hostim.dev, you can deploy Cap in one click, fully preconfigured with persistent storage and automatic HTTPS.
🔒 Protect your site with a privacy-focused, proof-of-work CAPTCHA – no tracking, no bloat.
Why Host Cap on Hostim.dev?
- 🐳 One-click Docker deployment – no manual setup or YAML
- 💾 Persistent volume included – stores all CAPTCHA data safely
- 🌍 Automatic HTTPS + domain – ready to use instantly
- 📊 Real-time logs and metrics – monitor performance at a glance
- 🔒 Private by design – no tracking or data collection
🎥 Watch how easy it is to deploy any open source app on Hostim.dev – this example shows Umami, but the flow is identical for Cap.
What’s included
| Resource | Details |
|---|---|
| App | tiago2/cap:latest Docker image |
| Volume | /usr/src/app/.data |
| Domain | Free *.hostim.dev subdomain |
| SSL | Let’s Encrypt (auto-enabled) |
| Port | 3000 |
| Defaults | ADMIN_KEY: immediately_change_this_to_minimum_30_chars |
How to Deploy
- Go to your Hostim.dev dashboard.
- Click Create Project → Use a Template.
- Select the Cap template.
- Choose a resource plan (Dev, Prod, or Full).
- Hit Deploy.
Your project will be ready in seconds. From there, open the Cap app and click the link to access your dashboard.
Post-Deploy Notes
- 🔑 Change the ADMIN_KEY immediately to a secure, 30+ character key under Environment Variables
- 🛡️ Cap uses proof-of-work to make it easier for humans and harder for bots
- 🌐 Add a custom domain under Networking → Domains
- 📈 View resource usage and logs under the App panel
Source + Docs
- GitHub: tiagorangel1/cap
- Documentation: capjs.js.org
- Demo: capjs.js.org/guide/demo.html
Looking for something else? Browse all templates →