Changed the docker base image to alpine because of the non existing ca-certificates

Dockerfile.amd64

@@ -1,12 +1,13 @@
-FROM scratch
+FROM alpine
 
 LABEL maintainer="Max Schmitt <max@schmitt.mx>"
 LABEL readme.md="https://github.com/maxibanki/golang-url-shortener/blob/master/README.md"
 LABEL description="This Dockerfile will install the Golang URL Shortener."
 
+RUN apk update && apk add ca-certificates
+
 EXPOSE 8080
 
-COPY ca-certificates.crt /etc/ssl/certs/
 COPY docker_releases/golang-url-shortener_linux_amd64/golang-url-shortener /
 
 VOLUME ["/data"]

Dockerfile.arm

@@ -1,12 +1,13 @@
-FROM scratch
+FROM alpine
 
 LABEL maintainer="Max Schmitt <max@schmitt.mx>"
 LABEL readme.md="https://github.com/maxibanki/golang-url-shortener/blob/master/README.md"
 LABEL description="This Dockerfile will install the Golang URL Shortener."
 
+RUN apk update && apk add ca-certificates
+
 EXPOSE 8080
 
-COPY ca-certificates.crt /etc/ssl/certs/
 COPY docker_releases/golang-url-shortener_linux_arm/golang-url-shortener /
 
 VOLUME ["/data"]