docs: Clean .env.example with proper placeholders

Author: Cadenadb

.env.example

@@ -1,27 +1,28 @@
-# RTMPayServer Environment Configuration
-# Copy this file to .env and fill in your values
+# ============================================================
+# RTMPayServer — Environment Configuration
+# Copy this file: cp .env.example .env
+# Then edit with your values before running docker compose up
+# ============================================================
 
-# === RAPTOREUM NODE ===
+# ── Raptoreum Node RPC ─────────────────────────────────────
 RTM_RPC_USER=rtmrpc
-RTM_RPC_PASSWORD=changeme_strong_password
-RTM_RPC_PORT=9998
+RTM_RPC_PASSWORD=change_me_strong_password_1
+RTM_P2P_PORT=10226
 
-# === BITCOIN NODE ===
+# ── Bitcoin Node RPC ───────────────────────────────────────
 BTC_RPC_USER=btcrpc
-BTC_RPC_PASSWORD=changeme_strong_password
+BTC_RPC_PASSWORD=change_me_strong_password_2
 BTC_NETWORK=mainnet
 # Options: mainnet | testnet | regtest
 
-# === BTCPAYSERVER ===
-BTCPAY_HOST=rtmpay.yourdomain.com
-BTCPAY_ROOTPATH=/
-NBITCOIN_NETWORK=mainnet
-
-# === POSTGRES ===
-POSTGRES_HOST=postgres
-POSTGRES_DB=btcpayserver
+# ── PostgreSQL ─────────────────────────────────────────────
 POSTGRES_USER=btcpay
-POSTGRES_PASSWORD=changeme_strong_password
+POSTGRES_PASSWORD=change_me_strong_password_3
+
+# ── BTCPayServer ───────────────────────────────────────────
+# Your domain or IP address (no http://, no trailing slash)
+BTCPAY_HOST=your-domain.com
+BTCPAY_PORT=23000
 
-# === LIGHTNING (optional) ===
-LIGHTNING_ALIAS=MyRTMPayNode
+# ── Lightning Network (optional) ───────────────────────────
+LIGHTNING_ALIAS=MyRTMPayNode