Added pattern checking for deadline

templates/meal_planner.html

@@ -39,7 +39,7 @@
 		<input type="text" name="flavor_text" id="flavor-text">
 		<h3>Can join until</h3>
 		<div class="sub-flex" id="deadline">
-			<input type="text" name="deadline-amount" id="deadline-amount" pattern="[0-9]+">
+			<input type="text" name="deadline-amount" id="deadline-amount" pattern="^\d+(\.\d+)?$">
 			<select id="deadline-unit">
 				<option value="m">Minutes</option>
 				<option value="h" selected>Hours</option>