feat(caddy): move routes into site.caddy

caddy/site.caddy

@@ -0,0 +1,9 @@
+{$BEAVERGRAM_DOMAIN} {
+	encode zstd gzip
+	reverse_proxy beavergram-api:8080
+}
+
+{$BEAVERGRAM_DEV_DOMAIN} {
+	encode zstd gzip
+	reverse_proxy beavergram-frontend:5173
+}