Update to go-1.24, simplify error handling in startup code (#110)

Author: majst01

Dockerfile

@@ -1,13 +1,12 @@
-FROM alpine:3.20 as health-downloader
-ENV GRPC_HEALTH_PROBE_VERSION=v0.4.28 \
+FROM alpine:3.21 as health-downloader
+ENV GRPC_HEALTH_PROBE_VERSION=v0.4.37 \
     GRPC_HEALTH_PROBE_URL=https://github.com/grpc-ecosystem/grpc-health-probe/releases/download
 RUN apk -U add curl \
  && curl -fLso /bin/grpc_health_probe \
     ${GRPC_HEALTH_PROBE_URL}/${GRPC_HEALTH_PROBE_VERSION}/grpc_health_probe-linux-amd64 \
  && chmod +x /bin/grpc_health_probe
 
-FROM alpine:3.20
-RUN apk -U add ca-certificates
+FROM gcr.io/distroless/static-debian12:nonroot
 COPY --from=health-downloader /bin/grpc_health_probe /bin/grpc_health_probe
 COPY bin/server /masterdata-api
 CMD ["/masterdata-api"]