refactor: update environment configuration and documentation

- Modified `.env.example` to reflect new API URL structure and added CDN configuration for external storage.
- Updated `.gitignore` to include deployment secrets and certificate files, ensuring sensitive information is not committed.
- Revised `BACKEND_INTEGRATION.md` to clarify authentication methods, replacing Cognito references with Nostr NIP-98.
- Deleted outdated documentation files (`CONTENT-INTEGRATION-COMPLETE.md`, `CURSOR-MCP-SETUP.md`, `FINAL-STATUS.md`, `FIXES-APPLIED.md`, `INDEEHHUB-INTEGRATION.md`, `PROJECT-COMPLETE.md`, `PROJECT-SUMMARY.md`) to streamline project documentation.

These changes enhance the clarity of the environment setup and improve the overall documentation structure for better developer onboarding.

src/utils/indeeHubApi.ts

@@ -22,12 +22,11 @@ export interface IndeeHubFilm {
 }
 
 /**
- * Fetch films from IndeeHub screening room
- * TODO: Replace with actual API call when authenticated
+ * Fetch films from IndeeHub screening room.
+ * For authenticated requests, use indeehub-api.service which attaches NIP-98 tokens.
  */
 export async function fetchFilms(): Promise<IndeeHubFilm[]> {
   try {
-    // TODO: Add authentication headers (NIP-98 for Nostr auth)
     const response = await fetch(`${INDEEDHUB_API}/screening-room?type=film`, {
       headers: {
         // Add your auth headers here