write black theme as well (codesandbox#3608)

Author: siddharthkp

packages/app/src/app/overmind/effects/vscode/initializers.ts

@@ -1,4 +1,5 @@
 import codeSandboxTheme from '@codesandbox/common/lib/themes/codesandbox.json';
+import codeSandboxBlackTheme from '@codesandbox/common/lib/themes/codesandbox-black';
 
 export function initializeThemeCache() {
   try {
@@ -81,6 +82,11 @@ export function initializeCodeSandboxTheme() {
     '/extensions/ngryman.codesandbox-theme-0.0.1/themes/CodeSandbox-color-theme.json',
     JSON.stringify(codeSandboxTheme)
   );
+
+  fs.writeFileSync(
+    '/extensions/codesandbox-black-0.0.1/themes/codesandbox-black.json',
+    JSON.stringify(codeSandboxBlackTheme)
+  );
 }
 
 export function installCustomTheme(id: string, name: string, theme: string) {