Add health check endpoints (/health and /ready) for container orchestration liveness and readiness probes. (#104)

* added health endpoint

* formatted files

---------

Co-authored-by: lxowalle <83055338+lxowalle@users.noreply.github.com>

Dockerfile

@@ -22,6 +22,10 @@ FROM alpine:3.23
 
 RUN apk add --no-cache ca-certificates tzdata curl
 
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD wget -q --spider http://localhost:18790/health || exit 1
+
 # Copy binary
 COPY --from=builder /src/build/picoclaw /usr/local/bin/picoclaw