fix(cookbook): add mainnet testing note (#597)

Author: dineshpinto

docs/hackathon/1-cookbook.mdx

@@ -257,13 +257,22 @@ type=pd-balanced \
 - Set the boot disk to `pd-balanced` as required by `c3-standard-*` series of machines
 - Set the confidential compute type to `TDX`
 
-## Setting up a static IP for instance
+## Setting up a static IP for your VM
 
 For any questions or assistance with setting up a static IP, reach out to the Flare team on [Telegram](https://t.me/+StI5VEIvtIg2ODlh).
 
 ## DApp contracts on testnet
 
-The following contract addresses are for the Coston2 testnet.
+:::tip[testing on mainnet]
+
+Testnet applications often lack the maintenance and economic structures seen on mainnet.
+
+For these cases, we suggest testing directly on Flare Mainnet.
+Reach out to the Flare team on [Telegram](https://t.me/+StI5VEIvtIg2ODlh) for a small amount of FLR.
+
+:::
+
+The following contract addresses are for the Coston2 testnet. You can get C2FLR tokens from the [Coston2 Faucet](https://faucet.flare.network/coston2).
 
 ### BlazeSwap (uni-v2 DeX)