chore(deps): update docker/dockerfile docker tag to v1.21 (#196)

renovate[bot] · web-flow · commit badef0f077e4 · 2026-01-29T17:16:40.000Z
Co-authored-by: renovate[bot] &lt;29139614+renovate[bot]@users.noreply.github.com&gt;
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.20
+# syntax=docker/dockerfile:1.21
 FROM lukemathwalker/cargo-chef:latest-rust-1.87 AS chef
 WORKDIR /app
 

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-# syntax=docker/dockerfile:1.20`
	`1`	`+# syntax=docker/dockerfile:1.21`
`2`	`2`	`FROM lukemathwalker/cargo-chef:latest-rust-1.87 AS chef`
`3`	`3`	`WORKDIR /app`
`4`	`4`