build(deps): bump golang from 1.15.1-alpine to 1.15.2-alpine (#351)

dependabot-preview[bot] · web-flow · commit 3265a44725be · 2020-09-10T12:33:25.000Z
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.15.1-alpine AS build
+FROM golang:1.15.2-alpine AS build
 
 ENV  CGO_ENABLED 0
 WORKDIR /code
