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

frontend/node_modules/yaml/dist/compose/util-contains-newline.js

@@ -1,36 +0,0 @@
-'use strict';
-
-function containsNewline(key) {
-    if (!key)
-        return null;
-    switch (key.type) {
-        case 'alias':
-        case 'scalar':
-        case 'double-quoted-scalar':
-        case 'single-quoted-scalar':
-            if (key.source.includes('\n'))
-                return true;
-            if (key.end)
-                for (const st of key.end)
-                    if (st.type === 'newline')
-                        return true;
-            return false;
-        case 'flow-collection':
-            for (const it of key.items) {
-                for (const st of it.start)
-                    if (st.type === 'newline')
-                        return true;
-                if (it.sep)
-                    for (const st of it.sep)
-                        if (st.type === 'newline')
-                            return true;
-                if (containsNewline(it.key) || containsNewline(it.value))
-                    return true;
-            }
-            return false;
-        default:
-            return true;
-    }
-}
-
-exports.containsNewline = containsNewline;