chore(deps): update golang docker tag to v1.21

renovate[bot] · web-flow · commit d3701d36b924 · 2023-08-09T05:38:31.000Z
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.18 AS build
+FROM golang:1.21 AS build
 
 WORKDIR /app
 
