bump dockerfile version 1.16 -> 1.18 (#1206)

DMW2151 · andrewsomething · web-flow · commit 51c4f6b63a5f · 2022-08-17T17:53:58.000-04:00
Co-authored-by: Andrew Starr-Bochicchio &lt;andrewsomething@users.noreply.github.com&gt;
diff --git a/Dockerfile b/Dockerfile
@@ -1,5 +1,5 @@
 # Step 1: Build
-FROM golang:1.16-alpine AS build
+FROM golang:1.18-alpine AS build
 
 ARG GOARCH=amd64
 ENV OUT_D /out
