Implement Phase 2 Frontend and Phase 3 Data Enrichment

- Initialize React+Vite Frontend with Ant Design Dashboard.
- Implement Data Enrichment: ReccoBeats (Audio Features) and Spotify (Genres).
- Update Database Schema via Alembic Migrations.
- Add Docker support (Dockerfile, docker-compose.yml).
- Update README with hosting instructions.

docker-compose.yml

@@ -0,0 +1,26 @@
+version: '3.8'
+services:
+  backend:
+    build:
+      context: ./backend
+    image: ghcr.io/bnair123/musicanalyser:latest
+    container_name: music-analyser-backend
+    restart: unless-stopped
+    volumes:
+      - /opt/mySpotify/music.db:/app/music.db
+    environment:
+      - SPOTIFY_CLIENT_ID=${SPOTIFY_CLIENT_ID}
+      - SPOTIFY_CLIENT_SECRET=${SPOTIFY_CLIENT_SECRET}
+      - SPOTIFY_REFRESH_TOKEN=${SPOTIFY_REFRESH_TOKEN}
+      - GEMINI_API_KEY=${GEMINI_API_KEY}
+    ports:
+      - '8000:8000'
+  frontend:
+    build:
+      context: ./frontend
+    container_name: music-analyser-frontend
+    restart: unless-stopped
+    ports:
+      - '8991:80'
+    depends_on:
+      - backend