Exporting NDWI values with Dates as CSV from Google Earth Engine - google-earth-engine

Question

my goal is to create a csv file from the data that is chosen between dates. This was the code that I used for creating the NDWI values. I want to export that data with date so that I can create a graph from time series of NDWI - date. But I could not found how, any help is appreciated, thanks.
Map.centerObject(areaOfInterest);
Map.addLayer(areaOfInterest);
var startDate = '2018-07-01';
var endDate = '2018-07-31';
var sentinelImageCollection = ee.ImageCollection('COPERNICUS/S2')
.filterBounds(areaOfInterest)
.filterDate(startDate, endDate);
print("Number of images = ", sentinelImageCollection.size());
// We select the image with the smallest cloudy pixel percentage
var sentinelImage = sentinelImageCollection.sort('CLOUDY_PIXEL_PERCENTAGE')
.first()
.clip(areaOfInterest);
print("Sentinel image taken at = ", sentinelImage.date());
// Visualize using RGB
Map.addLayer(sentinelImage, {min: 0.0, max: 2000, bands: ['B4', 'B3', 'B2']}, 'RGB');
// Visualize using NDWI
var ndwi = sentinelImage.normalizedDifference(['B3', 'B8']).rename('NDWI');
Map.addLayer(ndwi, {palette: ['red', 'yellow', 'green', 'cyan', 'blue']}, 'NDWI');
// Calculate the area of our region of interest
var aoiArea = ee.Image.pixelArea().divide(1e6).reduceRegion({
reducer: ee.Reducer.sum(),
geometry: areaOfInterest,
scale: 10,
}).get('area');
print('AOI area (km2):', aoiArea);
// Create NDWI mask
var ndwiThreshold = ndwi.gte(0.0);
var ndwiMask = ndwiThreshold.updateMask(ndwiThreshold);
Map.addLayer(ndwiThreshold, {palette:['black','white']}, 'NDWI Binary Mask');
Map.addLayer(ndwiMask, {palette:['blue']}, 'NDWI Mask');
// We can now calculate the masked areas pixel area
var ndwiPixelArea = ee.Image.pixelArea().addBands(ndwiMask.select('NDWI')).divide(1e6).reduceRegion({
reducer: ee.Reducer.sum().group(1),
geometry: areaOfInterest,
scale: 10,
bestEffort: true
});
var list = ee.List(ee.Dictionary(ndwiPixelArea).get('groups'));
var group0 = ee.Dictionary(list.get(0));
var ndwiWaterArea = ee.Number(group0.get('sum')).float();
print("Water area (km2):", ndwiWaterArea);