Add env and readme for deploy key setup

tests/govtool-frontend/playwright/.env.example

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+FRONTEND_URL=http://localhost:8080
+API_URL=http://localhost:8080/api
+
+DOCS_URL=https://docs.sanchogov.tools
+
+# 1 for testnet, 0 for mainnet
+NETWORK_ID=1,
+
+# Create mock wallets if true
+ONE_TIME_WALLET_SETUP=false,
+
+# Faucet
+FAUCET_API_URL=https://faucet.sanchonet.world.dev.cardano.org
+FAUCET_API_KEY=
+
+# Kuber
+KUBER_API_URL=https://sanchonet.kuber.cardanoapi.io
+KUBER_API_KEY=

tests/govtool-frontend/playwright/README.md

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+# GitHub Pages Deployment SSH Deploy Key Generation Guide
+
+This guide walks you through the process of generating an SSH deploy key for GitHub Pages deployment and securely integrating it into your workflow.
+
+## Generating the SSH Deploy Key
+
+Execute the following command in your terminal to generate the SSH deploy key:
+
+```bash
+ssh-keygen -t rsa -b 4096 -C "$(git config user.email)" -f gh-pages -N ""
+```
+
+This command will generate two files:
+
+- `gh-pages.pub`: Public key
+- `gh-pages`: Private key
+
+## Integration Steps
+
+1. **Repository Settings:**
+
+   - Navigate to your repository settings.
+
+2. **Adding Public Key to Deploy Keys: Add to** [`https://github.com/cardanoapi/govtool-test-reports`](https://github.com/cardanoapi/govtool-test-reports)
+
+   - Go to Deploy Keys and add your public key. Make sure to grant it write access.
+
+3. **Adding Private Key to Secrets:**
+   - Go to Secrets and add your private key as `DEPLOY_KEY`.