Reading the documentation about the Receiver Contract (https://academy.avax.network/course/interchain-messaging/04-icm-basics/06-create-receiver-contract) the environment variable "RECEIVER_ADDRESS" (otherwise the user could think, that the RECEIVER_ADDRESS is the wallet address of the receiver) should be called "RECEIVER_CONTRACT_ADDRESS" (otherwise the user could think, that the RECEIVER_ADDRESS is the wallet address of the receiver) and an additional description should be added, that this variable is the place where the contract got Deployed to.
Reading the documentation about the Receiver Contract (https://academy.avax.network/course/interchain-messaging/04-icm-basics/06-create-receiver-contract) the environment variable "RECEIVER_ADDRESS" (otherwise the user could think, that the RECEIVER_ADDRESS is the wallet address of the receiver) should be called "RECEIVER_CONTRACT_ADDRESS" (otherwise the user could think, that the RECEIVER_ADDRESS is the wallet address of the receiver) and an additional description should be added, that this variable is the place where the contract got Deployed to.