refactor: merge setup.sh into update.sh for seamless first-run

- update.sh now auto-generates .env from .env.example if missing
- Generates random JWT/SALT keys on first run
- Existing .env is never overwritten
- Deleted redundant setup.sh
- Updated all documentation references

update.sh

@@ -32,10 +32,28 @@ while [[ $# -gt 0 ]]; do
     esac
 done
 
-# 1. Pastikan file env ada
+# 1. Auto-generate .env jika belum ada (seamless first-run)
 if [ ! -f .env ]; then
-    echo "[-] ERROR: .env file not found. Please run ./setup.sh first to initialize configuration."
-    exit 1
+    echo "[!] .env file not found."
+    if [ -f .env.example ]; then
+        echo "[+] Auto-generating .env from .env.example..."
+        cp .env.example .env
+
+        # Generate secure random hex keys
+        RANDOM_JWT=$(openssl rand -hex 32)
+        RANDOM_SALT=$(openssl rand -hex 32)
+
+        sed -i "s/GantiDenganKunciRahasiaJWTUntukDashboard256Bit/$RANDOM_JWT/g" .env
+        sed -i "s/GantiDenganKunciGaramUntukWireGuard256Bit/$RANDOM_SALT/g" .env
+
+        echo "[+] Secure cryptographic keys have been auto-generated!"
+        echo "[+] Review .env file before continuing. Edit DB_PASSWORD, API_PORT, VITE_API_BASE_URL as needed."
+    else
+        echo "[-] ERROR: .env.example is missing. Cannot generate .env."
+        exit 1
+    fi
+else
+    echo "[+] .env file already exists. Skipping environment generation."
 fi
 
 # 2. Update Code dari Git (Main & Submodules)