Simplify Makefile commands and clarify Cloud9 requirement

- Remove `run-local` target from Makefile (local execution not supported)
- Rename `run-cloud9` to `run` for simpler command
- Add notice in README that project is designed for AWS Cloud9
- Clarify that MySQL and Redis do not start automatically in local environment

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: suna-big

Makefile

@@ -4,12 +4,8 @@ default: generate
 test:
 	go test -race -cover -parallel 4 ./...
 
-.PHONY: run-local
-run-local:
-	@ENV_ENVIRONMENT=local go run main.go
-
-.PHONY: run-cloud9
-run-cloud9:
+.PHONY: run
+run:
 	@ENV_ENVIRONMENT=cloud9 go run main.go
 
 .PHONY: generate

README.md

@@ -1,7 +1,10 @@
 # server-performance-tuning-2023
 
-## Cloud9で実行する場合
+**注意**: このプロジェクトは AWS Cloud9 環境での実行を前提としています。
+ローカル実行は想定されておらず、MySQL と Redis は自動的に起動しません。
+
+## 実行方法
 ```shell
 $ make setup
-$ make run-cloud9
+$ make run
 ```