diff --git a/README.md b/README.md
index 305508a..12d0ee5 100644
--- a/README.md
+++ b/README.md
@@ -1,15 +1,105 @@
 # AgoraExpansion
-Repository to house new validators and off-chain code for leveraging Agora with NFTs instead of FTs.
 
-The repository now contains a multi-validator in `agora-expansion/validators/governance-token.ak`, the multivalidator contains both the capability of minting the token representing voting power, and also a 'locker' which contains the NFTs and FTs used to generate voting power. A user locks their tokens in order to mint an alternative token used for voting as described in the research in the `ResearchPhase` directory, in addition to the voting power token, a receipt is minted to allow for the users NFTs to be claimed when burning the correct amount of the voting power token.
+Repository to house new validators and off-chain code for leveraging Agora with NFTs and FTs as governance voting power.
 
-The repository also contains off-chain transaction building code in `agora-expansion/src/index.ts` and emulator testing code in `agora-expansion/src/test.ts`
+The repository contains a multi-validator in `agora-expansion/validators/governance-token.ak`. The multi-validator supports minting the token that represents voting power, and a locker that holds the NFTs and FTs used to generate that voting power. A user locks their tokens to mint an alternative token used for voting as described in the research in the `ResearchPhase` directory. In addition to the voting power token, a receipt is minted so the user's NFTs and FTs can be claimed when burning the correct amount of voting power.
 
-The user can verify the test suite by running 
+## Repository layout
 
+- `agora-expansion`: validators, off-chain transaction building code, and emulator tests.
+- `agora-expansion-fe`: public graphical user interface for the expansion lock/redeem flow.
+- `ResearchPhase`: research notes and design references for using native assets as voting power.
+
+## Public GUI
+
+The public GUI is deployed at:
+
+`https://adaocommunity.github.io/AgoraExpansion/`
+
+This deployed interface is a static build of `agora-expansion-fe`. It requires Blockfrost configuration at build/deploy time so the app can read wallet assets and submit the normal lock/redeem flow.
+
+## GUI local setup
+
+Requirements:
+
+- Node.js and npm.
+- A Cardano browser wallet that exposes CIP-30.
+- A Blockfrost project key for the network being tested.
+- Testnet assets only when testing the preprod/testnet flow. Do not use real funds for test runs.
+
+Run the frontend locally:
+
+```bash
+cd agora-expansion-fe
+npm install
+cp .env.example .env
+npm start
+```
+
+PowerShell users can copy the environment file with:
+
+```powershell
+Copy-Item .env.example .env
+```
+
+The Create React App development server starts at `http://localhost:3000` by default.
+
+## Blockfrost configuration
+
+Create `agora-expansion-fe/.env` from `agora-expansion-fe/.env.example`, then add the Blockfrost key for the network you are testing.
+
+```bash
+REACT_APP_BLOCKFROST_MAINNET_URL=https://cardano-mainnet.blockfrost.io/api/v0
+REACT_APP_BLOCKFROST_MAINNET_API_KEY=
+
+REACT_APP_BLOCKFROST_TESTNET_URL=https://cardano-preprod.blockfrost.io/api/v0
+REACT_APP_BLOCKFROST_TESTNET_API_KEY=
 ```
+
+The `REACT_APP_` prefix is required because this frontend uses Create React App. Environment variables are read when `npm start` or `npm run build` starts. If the app shows `Blockfrost API key not configured`, add the matching `REACT_APP_BLOCKFROST_*_API_KEY` value and restart the dev server or rebuild the production bundle.
+
+Do not commit real Blockfrost API keys. Use repository or deployment secrets for hosted builds.
+
+## GUI user flow
+
+Community or configuration flow:
+
+1. Open the GUI and connect a Cardano wallet.
+2. Configure the governance asset rules for the community, including the FT and/or NFT policy IDs, asset names when required, and voting weights.
+3. Submit the configuration used by the expansion flow.
+
+Voter lock/redeem flow:
+
+1. Open the GUI and connect a Cardano wallet that holds eligible configured assets.
+2. Review the detected FT/NFT assets and select the assets to use for voting power.
+3. Submit the lock transaction. The selected assets are locked by the validator.
+4. Receive voting power plus a receipt token.
+5. Use the voting power in the Agora governance flow.
+6. Redeem by burning the required voting power/receipt pair to reclaim the locked assets.
+
+## Production build and deployment
+
+Build the frontend:
+
+```bash
+cd agora-expansion-fe
+npm install
+npm run build
+```
+
+The frontend package uses `"homepage": "."` so asset paths are relative and can be served from GitHub Pages at `https://adaocommunity.github.io/AgoraExpansion/`.
+
+For GitHub Pages or any hosted deployment, provide the `REACT_APP_BLOCKFROST_*` variables during the build. React embeds these values into the static bundle at build time.
+
+## Contract test suite
+
+The repository also contains off-chain transaction building code in `agora-expansion/src/index.ts` and emulator testing code in `agora-expansion/src/test.ts`.
+
+The user can verify the test suite by running:
+
+```bash
 npm install
 npm run test
 ```
 
-in the `agora-expansion` directory. This assumes that the user has npm installed locally.
\ No newline at end of file
+in the `agora-expansion` directory. This assumes that the user has npm installed locally.
diff --git a/agora-expansion-fe/.env.example b/agora-expansion-fe/.env.example
new file mode 100644
index 0000000..ea79e59
--- /dev/null
+++ b/agora-expansion-fe/.env.example
@@ -0,0 +1,10 @@
+# Blockfrost configuration for the AgoraExpansion frontend.
+# Copy this file to .env and fill in the API key for the network you are testing.
+# Do not commit real API keys.
+
+REACT_APP_BLOCKFROST_MAINNET_URL=https://cardano-mainnet.blockfrost.io/api/v0
+REACT_APP_BLOCKFROST_MAINNET_API_KEY=
+
+# The milestone test flow uses Cardano preprod/testnet assets.
+REACT_APP_BLOCKFROST_TESTNET_URL=https://cardano-preprod.blockfrost.io/api/v0
+REACT_APP_BLOCKFROST_TESTNET_API_KEY=
diff --git a/agora-expansion-fe/src/services/lucidService.ts b/agora-expansion-fe/src/services/lucidService.ts
index 1174371..e974953 100644
--- a/agora-expansion-fe/src/services/lucidService.ts
+++ b/agora-expansion-fe/src/services/lucidService.ts
@@ -1,12 +1,12 @@
 import { Lucid, Blockfrost, Network, C } from 'lucid-cardano';
 import { Asset } from './assetCache';
 
-// You'll need to set your Blockfrost API keys
+// Set Blockfrost API keys through .env / deployment secrets.
 // For mainnet: https://cardano-mainnet.blockfrost.io/api/v0
-// For testnet: https://cardano-testnet.blockfrost.io/api/v0
+// For preprod/testnet: https://cardano-preprod.blockfrost.io/api/v0
 const BLOCKFROST_MAINNET_URL = process.env.REACT_APP_BLOCKFROST_MAINNET_URL || 'https://cardano-mainnet.blockfrost.io/api/v0';
-const BLOCKFROST_MAINNET_API_KEY = process.env.REACT_APP_BLOCKFROST_MAINNET_API_KEY || 'mainnet1awJnGhrtbecFGCc7eWIf2VnB82r4ZOd';
-const BLOCKFROST_TESTNET_URL = process.env.REACT_APP_BLOCKFROST_TESTNET_URL || 'https://cardano-testnet.blockfrost.io/api/v0';
+const BLOCKFROST_MAINNET_API_KEY = process.env.REACT_APP_BLOCKFROST_MAINNET_API_KEY || '';
+const BLOCKFROST_TESTNET_URL = process.env.REACT_APP_BLOCKFROST_TESTNET_URL || 'https://cardano-preprod.blockfrost.io/api/v0';
 const BLOCKFROST_TESTNET_API_KEY = process.env.REACT_APP_BLOCKFROST_TESTNET_API_KEY || '';
 
 class LucidService {
@@ -28,8 +28,12 @@ class LucidService {
       blockfrostApiKey = BLOCKFROST_TESTNET_API_KEY;
     }
 
+    const apiKeyEnvName = network === 'Mainnet'
+      ? 'REACT_APP_BLOCKFROST_MAINNET_API_KEY'
+      : 'REACT_APP_BLOCKFROST_TESTNET_API_KEY';
+
     if (!blockfrostApiKey) {
-      throw new Error(`Blockfrost API key not configured for ${network}. Please set REACT_APP_BLOCKFROST_${network.toUpperCase()}_API_KEY environment variable.`);
+      throw new Error(`Blockfrost API key not configured for ${network}. Please set ${apiKeyEnvName} environment variable.`);
     }
 
     this.lucid = await Lucid.new(