fix: missing ssl certificates in docker image

Dockerfile

@@ -17,10 +17,22 @@ ENV GOOS=linux
 ENV GOARCH=amd64
 RUN make build-raw
 
+FROM alpine:latest as alpine
+RUN apk --no-cache add tzdata zip ca-certificates
+WORKDIR /usr/share/zoneinfo
+# -0 means no compression.  Needed because go's
+# tz loader doesn't handle compressed data.
+RUN zip -q -r -0 /zoneinfo.zip .
+
 FROM scratch
 COPY --from=build-env /app/server /server
 COPY --from=build-env /app/web /web
 
+ENV ZONEINFO /zoneinfo.zip
+COPY --from=alpine /zoneinfo.zip /
+# the tls certificates:
+COPY --from=alpine /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+
 ENV APP_ENV=production
 
 EXPOSE 8080