Serve small with Fly.io and GoStatic

Summary

The post shows how to deploy a tiny static signpost site on Fly.io using GoStatic, with the aim of keeping the application’s footprint and running cost low. GoStatic is a self-contained web server that can run in a bare Docker image; the described image is 6MB, while the completed deployment reports 7.7MB. The setup uses fly init examplegostatic -p 8043, a two-line Dockerfile based on pierrezemb/gostatic, and an index.html copied to /srv/http/index.html; Fly routes ports 80 and 443 to GoStatic’s port 8043 and provides HTTPS. After deployment reaches one healthy instance, the post reduces the default micro-2x VM from 512MB RAM to micro-1x, which provides 128MB. This matches the small workload and is presented as a way to reduce running costs.

Takeaways

1. 1

   GoStatic runs in a bare Docker image with no operating-system layer; the post describes the image as 6MB and the completed Fly deployment as 7.7MB.

2. 2

   Fly.io routes public ports 80 and 443 to GoStatic’s port 8043, while Fly handles HTTPS after deployment.

3. 3

   The default micro-2x VM can be changed to micro-1x, reducing memory from 512MB to 128MB for this small static workload.