chore: install cssbundling rails and set up compilation

spec/dummy/node_modules/yaml/dist/compose/util-contains-newline.js

@@ -0,0 +1,36 @@
+'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;