add code

cc_website/vite.config.ts

@@ -0,0 +1,58 @@
+import { defineConfig, type UserConfig } from 'vite';
+import { nodePolyfills } from 'vite-plugin-node-polyfills';
+import { viteSingleFile } from 'vite-plugin-singlefile';
+
+const plugins = [
+  nodePolyfills({
+    // needed for bitcoinjs-lib
+    include: ['buffer'],
+    globals: {
+      Buffer: true,
+    },
+  }),
+];
+
+// "normal" configuration - building for coldcard.com/pushtx
+// - creates a one JS and one CSS file
+const websiteConfig: UserConfig = {
+  plugins,
+  build: {
+    outDir: 'build',
+    rollupOptions: {
+      output: {
+        entryFileNames: (chunkInfo) => {
+          if (chunkInfo.name !== 'index') {
+            throw new Error(
+              `Build failed. Expected a single JS chunk "index". Saw: "${chunkInfo.name}".`
+            );
+          }
+          return 'pushtx.js';
+        },
+        assetFileNames: (chunkInfo) => {
+          if (chunkInfo.name !== 'index.css') {
+            throw new Error(
+              `Build failed. Expected a single CSS chunk "index.css". Saw: "${chunkInfo.name}".`
+            );
+          }
+          return 'pushtx.css';
+        },
+        chunkFileNames: (chunkInfo) => {
+          throw new Error(`Build failed. Not expecting any chunk files. Saw: "${chunkInfo.name}".`);
+        },
+      },
+    },
+  },
+};
+
+// single file config - builds a single HTML file with everything inlined
+// can be downloaded from coldcard.com/pushtx to self-host
+const singleFileConfig: UserConfig = {
+  plugins: [...plugins, viteSingleFile()],
+  build: {
+    outDir: 'build-single-file',
+  },
+};
+
+const finalConfig = process.env.PUSHTX_SINGLE_FILE ? singleFileConfig : websiteConfig;
+
+export default defineConfig(finalConfig);