Add example GCP start script

scripts/gcp-start.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+systemctl stop systemd-resolved
+
+if [ ! -d /etc/dnsseeder ]; then
+    mkdir -p /etc/dnsseeder
+fi
+
+cat <<EOF > /etc/dnsseeder/Corefile
+mainnet.seeder.zfnd.org {
+    dnsseed {
+        network mainnet
+        bootstrap_peers mainnet.z.cash:8233
+        crawl_interval 30m
+        record_ttl 600
+    }
+}
+
+testnet.seeder.zfnd.org {
+    dnsseed {
+        network testnet
+        bootstrap_peers testnet.z.cash:18233
+        crawl_interval 15m
+        record_ttl 300
+    }
+}
+EOF