add pwa

resources/js/pages/Rainfall.tsx

@@ -50,7 +50,7 @@ const Rainfall = () => {
                    value={graphDetails.end_date}
                    onChange={e => setGraphDetails({...graphDetails, end_date: (new Date(e.target.value)).toSQLDate()})} />
         </form>
-        <div ref={targetRef}>
+        <div ref={targetRef} className="mb-20">
             <RainfallGraph width={dimensions.width}
                            height={500}
                            data={graphData} start_date={graphDetails.start_date}