Moved the webapp to a webpack with some typescript, updated server wtih new endpoints

webapp/src/main.ts

@@ -0,0 +1,27 @@
+import ClimateChart from "./ClimateChart";
+
+const ROOT_URL: string = "climate/";
+const CHART_DOM_ID: string = "myChart";
+
+function createClimateChart() {
+    const pathname = window.location.pathname;
+    let minutesDisplayed = 60;
+    const argsStart = pathname.search(/\?minute-span=/);
+    if (argsStart !== -1) {
+        const parsedMins = Number(pathname[12]);
+        if (!isNaN(parsedMins) && parsedMins > 0) {
+            minutesDisplayed = parsedMins;
+        }
+    }
+    return new ClimateChart(ROOT_URL, CHART_DOM_ID, minutesDisplayed);
+}
+
+const overlay = document.createElement('div');
+overlay.innerText = 'Loading data...';
+overlay.className = 'overlay';
+document.getRootNode().appendChild(overlay);
+
+const climateChart = createClimateChart();
+climateChart.onLoaded(() => {
+    overlay.classList.add('hidden');
+})