Go Embed Single-Page Application

Although there are many alternatives to deploying a single-page application, you might find a situation where you need to deploy it in an isolated environment or just portability concern.

The example is using SvelteKit to generate a single-page application and embed it with Golang with Docker multi-stage build for smaller image.

Tech

• SvelteKit
• Go
• Echo
• Fiber
• Docker

Build the image

Go HTTP standard library

make build

Echo framework

make build APP_NAME=echo

Fiber framework

make build APP_NAME=fiber

Run the application

The default port is 5050, configure a runnable app port with APP_PORT=xxxx.

Go HTTP standard library

make run

Echo framework

make run APP_NAME=echo APP_PORT=5051

Fiber framework

make run APP_NAME=fiber APP_PORT=5052

Update

Reduce the binary size around 50%-70% by using UPX.

Before:

REPOSITORY   TAG       IMAGE ID       CREATED              SIZE
spa          fiber     ddbdf411532d   7 seconds ago        8.98MB
spa          echo      f0f144aecd27   53 seconds ago       10.9MB
spa          http      1b4f9bd0632b   About a minute ago   7.29MB

After:

REPOSITORY   TAG       IMAGE ID       CREATED         SIZE
spa          fiber     6a2d174a176b   6 minutes ago   5.23MB
spa          echo      a82aa5113481   7 minutes ago   5.79MB
spa          http      4248e779a14f   8 minutes ago   4.49MB