Add yet-another-react-lightbox package and update .gitignore to exclude node_modules

frontend/node_modules/flatpickr/dist/esm/utils/index.js

@@ -1,17 +0,0 @@
-export var pad = function (number, length) {
-    if (length === void 0) { length = 2; }
-    return ("000" + number).slice(length * -1);
-};
-export var int = function (bool) { return (bool === true ? 1 : 0); };
-export function debounce(fn, wait) {
-    var t;
-    return function () {
-        var _this = this;
-        var args = arguments;
-        clearTimeout(t);
-        t = setTimeout(function () { return fn.apply(_this, args); }, wait);
-    };
-}
-export var arrayify = function (obj) {
-    return obj instanceof Array ? obj : [obj];
-};