FEAT: use versioning for frontend (npm) and copy it to lnbits/static/vendor for easier updating (#1590)

* remove static/vendor

* add node dependencies

* add bolt11-decoder

* run npm install inside dockerimage

* only use bundle.js and bundle.css

* use node_modules for bundling vendor assets

* remove dead code

* make argument optional

* reintroduce vendor dir

* reintroduce vendor and single javascript files, minification

* wrong moment, remove minification

* lock packages with non critical issues

* black

lnbits/static/vendor/Chart.css

@@ -0,0 +1,47 @@
+/*
+ * DOM element rendering detection
+ * https://davidwalsh.name/detect-node-insertion
+ */
+@keyframes chartjs-render-animation {
+	from { opacity: 0.99; }
+	to { opacity: 1; }
+}
+
+.chartjs-render-monitor {
+	animation: chartjs-render-animation 0.001s;
+}
+
+/*
+ * DOM element resizing detection
+ * https://github.com/marcj/css-element-queries
+ */
+.chartjs-size-monitor,
+.chartjs-size-monitor-expand,
+.chartjs-size-monitor-shrink {
+	position: absolute;
+	direction: ltr;
+	left: 0;
+	top: 0;
+	right: 0;
+	bottom: 0;
+	overflow: hidden;
+	pointer-events: none;
+	visibility: hidden;
+	z-index: -1;
+}
+
+.chartjs-size-monitor-expand > div {
+	position: absolute;
+	width: 1000000px;
+	height: 1000000px;
+	left: 0;
+	top: 0;
+}
+
+.chartjs-size-monitor-shrink > div {
+	position: absolute;
+	width: 200%;
+	height: 200%;
+	left: 0;
+	top: 0;
+}

lnbits/static/vendor/chart.js@2.9.3/chart.min.css

@@ -1 +0,0 @@
-@keyframes chartjs-render-animation{from{opacity:.99}to{opacity:1}}.chartjs-render-monitor{animation:chartjs-render-animation 1ms}.chartjs-size-monitor,.chartjs-size-monitor-expand,.chartjs-size-monitor-shrink{position:absolute;direction:ltr;left:0;top:0;right:0;bottom:0;overflow:hidden;pointer-events:none;visibility:hidden;z-index:-1}.chartjs-size-monitor-expand>div{position:absolute;width:1000000px;height:1000000px;left:0;top:0}.chartjs-size-monitor-shrink>div{position:absolute;width:200%;height:200%;left:0;top:0}