ci: add container build workflow

Add prebuilt build images and a publish workflow to speed CI by reusing heavy dependencies.

packages/containers/script/build.ts

@@ -0,0 +1,25 @@
+#!/usr/bin/env bun
+
+import { $ } from "bun"
+
+const dir = new URL("..", import.meta.url).pathname
+process.chdir(dir)
+
+const reg = process.env.REGISTRY ?? "ghcr.io/anomalyco"
+const tag = process.env.TAG ?? "24.04"
+const push = process.argv.includes("--push") || process.env.PUSH === "1"
+
+const images = ["base", "bun-node", "rust", "tauri-linux", "publish"]
+
+for (const name of images) {
+  const image = `${reg}/build/${name}:${tag}`
+  const file = `packages/containers/${name}/Dockerfile`
+  const arg = name === "base" ? "" : `--build-arg REGISTRY=${reg}`
+  const cmd = `docker build -f ${file} -t ${image} ${arg} .`
+  console.log(cmd)
+  await $`${cmd}`
+
+  if (push) {
+    await $`docker push ${image}`
+  }
+}