add docker health checks

backend/Dockerfile

@@ -21,7 +21,10 @@ RUN --mount=type=cache,target=/usr/local/cargo/registry \
     cargo build --release --bin nuchat --target-dir=/app/target
 
 FROM gcr.io/distroless/cc AS runtime
-WORKDIR /app
-COPY --from=builder /app/target/release/nuchat ./nuchat
 
-ENTRYPOINT [ "./nuchat", "--host 0.0.0.0" ]
+ADD --chmod=a+x vendor/busybox_WGET /usr/bin/wget
+COPY --from=builder /app/target/release/nuchat /usr/bin/
+
+# HEALTHCHECK --interval=5s --retries=1 --timeout=5s CMD ["wget", "-q", "--spider", "http://localhost:7000/healthcheck
+
+ENTRYPOINT [ "nuchat", "--host", "0.0.0.0" ]