Add CloudFormation template and README for Don't Starve Together dedicated server on AWS

README.md

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+# Don't Starve Together Dedicated Server on AWS
+
+This CloudFormation template deploys a dedicated server for the game *Don't Starve Together* on AWS. The setup includes a VPC, a subnet, an EC2 instance configured for the DST server, and appropriate networking configurations.
+
+## Prerequisites
+
+1. **AWS CLI**: Ensure you have the AWS CLI installed and configured.
+2. **Key Pair**: Replace `myserverkey` with the name of an existing EC2 key pair in your AWS account to access the instance.
+3. **IAM Permissions**: Your AWS user needs permissions to deploy CloudFormation stacks and create EC2, VPC, and related resources.
+
+## Resources Created
+
+- **VPC**: A Virtual Private Cloud for network isolation.
+- **Subnet**: A subnet within the VPC.
+- **Security Group**: Allows necessary ports for the DST server and SSH access from a specific IP range.
+- **Internet Gateway and Route Table**: Provides internet access to the subnet.
+- **EC2 Instance**: An Ubuntu-based instance running the DST dedicated server.
+
+## Security Group Configuration
+
+| Protocol | Ports   | Purpose                              | IP Range           |
+|----------|---------|--------------------------------------|--------------------|
+| UDP      | 11000-11001, 27018-27019, 8768-8769 | Game server ports for Master and Caves shards | 0.0.0.0/0          |
+| TCP      | 22      | SSH for server access               | Your IP range      |
+
+## Deployment
+
+Replace the key pair name mentioned above, the AMI ID, the instance type, the SSH IP range, and the variables `CLUSTER_NAME`, `CLUSTER_DESCRIPTION`, `CLUSTER_PASSWORD`, `CLUSTER_KEY`, `ADMIN_ID`, `TOKEN`, and world generation settings in the `dst.yml` file to match your requirements.
+
+To deploy the stack:
+
+```bash
+aws cloudformation create-stack --stack-name DST-Server-Stack --template-body dst.yml --capabilities CAPABILITY_IAM
+```
+
+## Cleanup
+
+To delete the stack:
+
+```bash
+aws cloudformation delete-stack --stack-name DST-Server-Stack
+```
+
+## References
+
+- [Don't Starve Together Dedicated Servers](https://forums.kleientertainment.com/forums/topic/64441-dedicated-server-quick-setup-guide-linux/)
+- [worldgenoverride.lua Settings for March QoL Update](https://forums.kleientertainment.com/forums/topic/127830-worldgenoverridelua-settings-for-march-qol-update/)