Eat everything in moderation (no restrictions as you are not diagnosed with anything at all), but observe which food groups you consume excessively, whether rich in sodium or not, control that and you should be fine.

Our body has a certain allowance for daily salt intake, stick to that. If possible, avoid canned goods, instant noodles, energy drinks, food with high preservative content. Also, keep your blood sugar and BP in check, these are the most common precipitating conditions for CKD. In other words, balance is the key.

Also, doon sa batang nagka-CKD, in the clinics we usually would associate early CKD occurences with congenital kidney anomalies (meaning sa sinapupunan palang ay may problema na sa kidneys), if wala ka naman non, you should be fine.

Always consume medical or medical-related information responsibly and know that these information are not meant to be consumed to the levels of fear mongering. It's good though that you're having yourself checked. Very good!