Changed Dockerfile to build with Amazon linux

Author: rohang98

Dockerfile

@@ -1,6 +1,11 @@
-FROM golang:alpine3.12 as build
+FROM amazonlinux:latest AS build
 
-RUN apk add -U --no-cache ca-certificates git bash
+RUN yum -y update && rm -rf /var/cache/yum/*
+RUN yum install -y  \
+      ca-certificates \
+      git \
+      bash \
+      go
 
 RUN mkdir /aws-sigv4-proxy
 WORKDIR /aws-sigv4-proxy
@@ -14,7 +19,7 @@ COPY . .
 RUN CGO_ENABLED=0 GOOS=linux go build -o /go/bin/aws-sigv4-proxy
 
 FROM scratch
-COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=build /etc/ssl/certs/ca-bundle.crt /etc/ssl/certs/
 COPY --from=build /go/bin/aws-sigv4-proxy /go/bin/aws-sigv4-proxy
 
 ENTRYPOINT [ "/go/bin/aws-sigv4-proxy" ]