chore: fix dockerfile

Author: eliasscosta

Dockerfile

@@ -3,12 +3,11 @@ FROM golang:1.19-alpine as build
 WORKDIR ${GOPATH}/src/github.com/quintoandar
 RUN apk update && apk add make git curl && git clone --branch main https://github.com/quintoandar/postgres_exporter.git
 WORKDIR ${GOPATH}/src/github.com/quintoandar/postgres_exporter
-ENV GOARCH=amd64
 RUN make release
 RUN chmod +x postgres_exporter && mv postgres_exporter /tmp/postgres_exporter
 
 
-FROM quay.io/prometheus/busybox:latest as final
+FROM alpine as final
 
 COPY --from=build ["/tmp/postgres_exporter", "/" ]