Add CORS support and Docker configuration for web service

- Added CORS allowed origins in config.compose.yaml to enable cross-origin requests from the web service.
- Updated docker-compose.yml to include a new web service with build context and port mapping for local development.
- Enhanced gateway.go to support additional HTTP methods in CORS responses.
- Updated README.md to document the new web service and its configuration requirements.

internal/server/gateway.go

@@ -98,7 +98,7 @@ func (g *Gateway) withCORS(next http.Handler) http.Handler {
 		ok, allowOrigin := corsMatch(g.corsAllowed, origin)
 		if ok {
 			w.Header().Set("Access-Control-Allow-Origin", allowOrigin)
-			w.Header().Set("Access-Control-Allow-Methods", "GET, HEAD, OPTIONS")
+			w.Header().Set("Access-Control-Allow-Methods", "GET, HEAD, POST, PUT, PATCH, DELETE, OPTIONS")
 			w.Header().Set("Access-Control-Allow-Headers", "Authorization, Content-Type, X-Request-Id")
 			w.Header().Set("Access-Control-Max-Age", "86400")
 		}