Add /healthz route

Author: code-asher

api/api.go

@@ -52,6 +52,10 @@ func New(options *Options) *API {
 		httpapi.WriteBytes(rw, http.StatusOK, []byte("Marketplace is running"))
 	})
 
+	r.Get("/healthz", func(rw http.ResponseWriter, r *http.Request) {
+		httpapi.WriteBytes(rw, http.StatusOK, []byte("API server running"))
+	})
+
 	return &API{
 		Handler: r,
 	}

api/api_test.go

@@ -31,4 +31,8 @@ func TestServer(t *testing.T) {
 	resp, err = http.Get(server.URL)
 	require.NoError(t, err)
 	require.Equal(t, http.StatusOK, resp.StatusCode)
+
+	resp, err = http.Get(server.URL + "/healthz")
+	require.NoError(t, err)
+	require.Equal(t, http.StatusOK, resp.StatusCode)
 }

api/httpmw/logger.go

@@ -21,6 +21,11 @@ func Logger(log slog.Logger) func(next http.Handler) http.Handler {
 
 			next.ServeHTTP(sw, r)
 
+			// Do not log successful health check requests.
+			if r.URL.Path == "/healthz" && sw.Status == 200 {
+				return
+			}
+
 			httplog = httplog.With(
 				slog.F("took", time.Since(start)),
 				slog.F("status_code", sw.Status),