fix/add tests, update heatmap range, finish android release, add readme

Stop tracking gradle.properties

server/src/services/review.service.js

@@ -97,11 +97,7 @@ export const processLesson = async (user, subjectId) => {
 	if (!item) throw new Error('Item not found');
 
 	item.srsLevel = 1;
-
-	const nextReview = new Date();
-	nextReview.setUTCHours(nextReview.getUTCHours() + 2);
-	nextReview.setUTCMinutes(0, 0, 0);
-	item.nextReview = nextReview;
+	item.nextReview = getSRSDate(1);
 
 	await item.save();
 	return { success: true, item };