Hello HN! I built DockBridge to solve a frustration I've had for years: Docker on macOS is heavy, but cloud dev servers are expensive (and annoying to manage).

Hello HN! I built DockBridge to solve a frustration I've had for years: Docker on macOS is heavy, but cloud dev servers are expensive (and annoying to manage). The Problem If you're on a Mac (especially Apple Silicon) or Windows: 1. Local Docker: Drains battery, spins fans, uses 10s of GBs of disk, and cross-arch builds (amd64) are painfully slow via emulation. 2. Remote Docker: You buy a VPS ($20-50/mo), set up SSH/Docker context. But you have to manage it, secure it, and you pay for it 24/7 even if you only build once a day. The Solution: Ephemeral, Persistent, Auto-Scaling (in future) DockBridge allows you to point your local Docker client at a cheap cloud server that only exists when you need it. 1. Run: `export DOCKER_HOST=unix:///tmp/dockbridge.sock` 2. Use: Run `docker build .` or `docker run ...` locally. 3. Magic: DockBridge sees the request. If no server exists, it calls the cloud API (currently Hetzner) and provisions one (~60s). 4. Connect: It tunnels traffic via SSH. 5. Sleep: When you stop using it, DockBridge detects idleness and destroys the compute instance. 6. Persist: It uses persistent block storage for `/var/lib/docker`. When the server comes back up, all your images, layers, and volumes are instantly there. No re-pulling. Cost It uses Hetzner Cloud (because it's cheap and reliable). - Compute: You pay ~$0.01/hour (CPX21: 3 vCPU, 4GB RAM) only while active. - Storage: You pay ~€0.05/month for 10GB of persistent data. - Total: For typical dev usage, it costs pennies instead of $50/mo. Technical Details - Written in Go. - Implements a proxy for the Docker socket. - Manages strict security: generates temporary SSH keys, sets up firewalls (no open ports), uses SSH tunneling for all traffic. - Open Source: AGPL-3.0. I'd love to hear your feedback! Specifically: - What other cloud providers would you like to see? (AWS/GCP/DigitalOcean?) - Are there other features (like sync for bind mounts) that would make this your daily driver?