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Does Dokku support zero-downtime deployments?

Yes. Dokku spins up the new Docker container build and performs health check checks before routing Nginx traffic away from the old container, guaranteeing zero downtime during deployment.

When should a company stay on Vercel despite higher costs?

Stay on Vercel if your team lacks basic Linux sysadmin capabilities, relies heavily on Vercel Preview Deployments for pull requests, or operates an early-stage MVP with negligible traffic.

Technology • 15 min read

High-Traffic Web Infrastructure: Vercel Serverless vs. Hetzner Dokku (80% Cost Reduction)

A cloud hosting infrastructure guide modeling bandwidth egress, serverless cold starts, and container orchestration to transition high-growth Node.js and Next.js applications from Vercel to dedicated Hetzner servers running Dokku.

By Enow A. Jovial • Published 2026-07-22

> [!FOUNDER]

> "Vercel offers the world's best developer experience for prototyping frontend applications. However, once your web app scales to millions of requests and terabytes of bandwidth egress, serverless function invocation limits and $0.15/GB bandwidth pricing can result in multi-thousand-dollar monthly cloud bills. Transitioning to self-hosted PaaS solutions like Dokku on Hetzner cuts infrastructure overhead by over 80% without sacrificing deployment simplicity." — Enow A. Jovial, Founder & Chief Executive Officer

Serverless Convenience vs. Dedicated Compute Economics

Serverless computing charges for CPU execution time, memory allocation, and data transfer. While ideal for unpredictable traffic spikes, predictable high-traffic SaaS products pay a steep premium compared to bare-metal compute resources:

!Server Room Rack Switches and Network Cables

Infrastructure Cost Model at 2,000,000 Monthly Pageviews (3 TB Egress)

Note: Comparative infrastructure costs calculated based on published public vendor pricing tiers as of August 2026. Actual cloud expenditures vary with container RAM allocation, compute duration, and CDN edge cache hit ratios.

Assume a Next.js / Express application serving 2M pageviews, consuming 3,000 GB of bandwidth, and executing 10M serverless function calls monthly:

| Resource Metric | Vercel Pro Plan + Usage Overage | Hetzner AX42 Dedicated + Dokku |

| :--- | :--- | :--- |

| Base Monthly Plan Fee | $20 / seat | $0 (Open Source Dokku PaaS) |

| Compute Hardware | Shared Serverless Execution | Dedicated 8-Core AMD Ryzen 7, 64 GB RAM |

| Bandwidth Egress Included | 1,000 GB | 20,000 GB (20 TB included free) |

| Egress Overage Charge (2,000 GB) | $300 ($0.15 / GB) | $0 (Well within 20 TB allocation) |

| Serverless Invocations (10M execution units) | $60 | $0 (Unlimited container executions) |

| Total Estimated Monthly Bill | $380 / month | $49 / month |

| Annual Infrastructure Expense | $4,560 / year | $588 / year (87% Savings) |

Architecture Overview: Self-Hosted Dokku PaaS on Hetzner

Dokku provides a mini-Heroku experience on your own server, allowing simple git-push deployments ('git push dokku main') with automated Let's Encrypt SSL certificates, Nginx reverse proxying, and Docker containerization.

```

[ Developer Machine ] ──► git push dokku main ──► [ Hetzner Cloud Server ]

│

├──► [ Dokku PaaS Controller ]

│ ├── Automatic Docker Buildpack

│ └── Zero-Downtime Container Swap

│

├──► [ Nginx Reverse Proxy + SSL ]

└──► [ Redis & Postgres Containers ]

```

Dokku Server Provisioning Quick-Start

Provision a dedicated server running Ubuntu 24.04 LTS and execute:

```bash

1. Install Dokku

wget -NP /tmp https://dokku.com/install/v0.34.0/bootstrap.sh

sudo DOKKU_TAG=v0.34.0 bash /tmp/bootstrap.sh

2. Add SSH Deployment Key

cat ~/.ssh/id_rsa.pub | dokku ssh-keys:add admin

3. Create Application Container

dokku apps:create my-app

4. Enable Automatic Let's Encrypt SSL

dokku plugin:install https://github.com/dokku/dokku-letsencrypt.git

dokku config:set --no-restart my-app DOKKU_LETSENCRYPT_EMAIL=admin@my-domain.com

dokku letsencrypt:enable my-app

```

Infrastructure Migration Checklist

[x] Benchmark current application RAM and CPU footprints during peak traffic hours

[x] Set up Cloudflare Free CDN in front of Hetzner server to cache static assets at the edge

[x] Configure automated offsite database backups to AWS S3 or Backblaze B2 using dokku postgres:backup

[x] Enforce health check endpoints (/api/health) for zero-downtime container rotations