Enhance emulator setup with Caddy support and update documentation

- Added Caddyfile example for HTTPS configuration.
- Updated README to include Caddy as an optional component.
- Modified make-certs.sh to use dynamic account names for certificate generation.
- Improved add-account.sh to handle missing accounts.env file gracefully.
- Enhanced run-server.sh to support Caddy integration and OAuth options.

Caddyfile.example

@@ -0,0 +1,17 @@
+# Caddyfile for Azure Storage Emulator
+# It uses /etc/hosts entries to route requests to the emulator
+# Replace "devstoreaccount1" with a desired storage account name if needed
+devstoreaccount1.blob.core.windows.net {
+	tls storage/server_cert.pem storage/server_key.pem
+	reverse_proxy localhost:10000
+}
+
+devstoreaccount1.queue.core.windows.net {
+	tls storage/server_cert.pem storage/server_key.pem
+	reverse_proxy localhost:10001
+}
+
+devstoreaccount1.table.core.windows.net {
+	tls storage/server_cert.pem storage/server_key.pem
+	reverse_proxy localhost:10002
+}