Bump golang from 1.18-alpine to 1.19.0-alpine in /build (#68)

Bumps golang from 1.18-alpine to 1.19.0-alpine.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

build/Dockerfile

@@ -8,7 +8,7 @@ COPY ${CONFIG_FILE} /etc/nginx-ns1-gslb/config.yaml
 ENTRYPOINT ["/nginx-ns1-gslb", "-config-file", "/etc/nginx-ns1-gslb/config.yaml"]
 
 
-FROM golang:1.18-alpine as builder
+FROM golang:1.19.0-alpine as builder
 WORKDIR /go/src/github.com/nginxinc/nginx-ns1-gslb/cmd/agent
 COPY go.mod go.sum /go/src/github.com/nginxinc/nginx-ns1-gslb/
 RUN go mod download