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

frontend/node_modules/yaml/browser/dist/compose/util-empty-scalar-position.js

@@ -1,27 +0,0 @@
-function emptyScalarPosition(offset, before, pos) {
-    if (before) {
-        if (pos === null)
-            pos = before.length;
-        for (let i = pos - 1; i >= 0; --i) {
-            let st = before[i];
-            switch (st.type) {
-                case 'space':
-                case 'comment':
-                case 'newline':
-                    offset -= st.source.length;
-                    continue;
-            }
-            // Technically, an empty scalar is immediately after the last non-empty
-            // node, but it's more useful to place it after any whitespace.
-            st = before[++i];
-            while (st?.type === 'space') {
-                offset += st.source.length;
-                st = before[++i];
-            }
-            break;
-        }
-    }
-    return offset;
-}
-
-export { emptyScalarPosition };