feat: fix example and add local UI counter UI

anchor-counter/app/LICENSE

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+MIT License
+
+Copyright (c) 2023 Magicblock Pte. Ltd.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

anchor-counter/app/README.md

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+# Ephemeral Counter UI
+
+This is a React-based UI for the Ephemeral Counter program, which is part of the documentation for integrating with the Ephemeral Rollups.
+
+## Overview
+
+The UI demonstrates the use of Solana's ephemeral rollups with a simple counter program. It showcases an `increment` instruction that can run both on the main network and ephemeral rollup.
+
+## Documentation
+
+For more information, visit: [Ephemeral Rollups Documentation](https://docs.magicblock.gg/Accelerate/ephemeral_rollups).
+
+## Getting Started
+
+### Prerequisites
+
+- Node.js
+- npm
+
+### Installation
+
+1. Navigate to the `app` directory
+2. Install the dependencies:
+
+
+    npm install
+
+
+### Running the Application
+
+To start the application, run:
+
+
+    npm run dev
+
+
+### Configure RPC endpoints
+
+This UI talks to two RPC endpoints:
+- REACT_APP_PROVIDER_ENDPOINT: the Solana RPC used by the wallet and on-chain counter (e.g., your local validator or a public RPC).
+- REACT_APP_EPHEMERAL_PROVIDER_ENDPOINT: the Ephemeral Rollup RPC used for the ephemeral counter.
+
+You can set them via environment variables when starting the app.
+
+Examples
+- Using localhost (same machine):
+    REACT_APP_PROVIDER_ENDPOINT=http://localhost:8899 \
+    REACT_APP_EPHEMERAL_PROVIDER_ENDPOINT=http://localhost:7799 \
+    npm run start
+
+If these variables are not provided, the app will default to MagicBlock’s public endpoints:
+- REACT_APP_PROVIDER_ENDPOINT → https://rpc.magicblock.app/devnet
+- REACT_APP_EPHEMERAL_PROVIDER_ENDPOINT → https://devnet.magicblock.app
+

anchor-counter/app/app/LICENSE.md

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+MIT License
+
+Copyright (c) 2023 Magicblock Pte. Ltd.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

anchor-counter/app/app/README.md

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+## 🚀 Getting Started
+
+### Npm
+
+```bash
+npm run install
+```
+
+```bash
+npm run start
+```
+
+### Yarn
+
+```bash
+yarn install
+```
+
+```bash
+yarn start
+```
+
+## 💚 Open Source
+
+Open Source is at the heart of what we do at MagicBlock. We believe building software in the open, with thriving communities, helps leave the world a little better than we found it.

anchor-counter/app/app/craco.config.js

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+// craco.config.js
+const webpack = require('webpack');
+
+module.exports = {
+    webpack: {
+        configure: (webpackConfig) => {
+            // Specify fallbacks for Node.js modules that are not available in the browser
+            webpackConfig.resolve.fallback = {
+                http: require.resolve('stream-http'),
+                https: require.resolve('https-browserify'),
+                crypto: require.resolve('crypto-browserify'),
+                stream: require.resolve('stream-browserify'),
+                buffer: require.resolve('buffer-browserify'),
+                zlib: false,
+                url: false,
+                vm: false,
+            };
+
+            webpackConfig.output = {
+                ...webpackConfig.output,
+                publicPath: '/',
+            };
+
+            // Add Buffer global if it's missing
+            webpackConfig.plugins = (webpackConfig.plugins || []).concat(
+                new webpack.ProvidePlugin({
+                    Buffer: ['buffer', 'Buffer'],
+                })
+            );
+
+            // Ignore specific warnings (adjust the regex as needed)
+            const ignoredWarnings = [/Failed to parse source map/];
+
+            // Webpack 5 approach to use the 'ignoreWarnings' option
+            webpackConfig.ignoreWarnings = webpackConfig.ignoreWarnings || [];
+            webpackConfig.ignoreWarnings = [
+                ...webpackConfig.ignoreWarnings,
+                ...ignoredWarnings.map((pattern) => ({
+                    message: pattern,
+                })),
+            ];
+
+            return webpackConfig;
+        },
+    },
+};