Merge pull request #21 from stuart-warren/snyk-fix-2e3b8e21e39ef6a48e143f8642a1b619

[Snyk] Security upgrade alpine from 3.15 to 3.16

Author: stuart-warren

Dockerfile

@@ -3,7 +3,7 @@ WORKDIR /go/src/github.com/stuart-warren/yamlfmt/
 COPY . .
 RUN CGO_ENABLED=0 GOOS=linux go build -a -o yamlfmt ./cmd/yamlfmt
 
-FROM alpine:3.15  
+FROM alpine:3.16  
 RUN apk --no-cache add diffutils
 WORKDIR /tmp
 COPY --from=0 /go/src/github.com/stuart-warren/yamlfmt/yamlfmt /usr/local/bin/yamlfmt