Address PR feedback: Add volume mount for Gradle cache, rename README, and remove redundant GRADLE_OPTS

Co-authored-by: trask <[email protected]>

Author: Copilot

.devcontainer/DEVCONTAINER_README.md .devcontainer/README.md.devcontainer/DEVCONTAINER_README.md renamed to .devcontainer/README.md

@@ -5,7 +5,7 @@ This devcontainer configuration is designed to optimize the development environm
 ## What's Included
 
 - **Java 17 (Temurin)**: Pre-installed Java Development Kit
-- **Gradle 8.11.1**: Pre-installed build tool matching project requirements
+- **Gradle Wrapper**: Uses project's gradle wrapper for build consistency
 - **Docker in Docker**: For containerized smoke tests
 - **VS Code Extensions**: Java development extensions
 
@@ -24,4 +24,4 @@ This devcontainer is automatically used by GitHub Copilot agents when working on
 
 ## Validation
 
-Run `.github/scripts/validate-devcontainer.sh` to verify the setup is working correctly.
+Run `.devcontainer/validate-devcontainer.sh` to verify the setup is working correctly.

.devcontainer/devcontainer.json

@@ -20,8 +20,11 @@
     }
   },
   "containerEnv": {
-    "GRADLE_OPTS": "-Dorg.gradle.daemon=true -Dorg.gradle.parallel=true -Dorg.gradle.caching=true -XX:MaxMetaspaceSize=512m"
+    "GRADLE_OPTS": "-Dorg.gradle.daemon=true"
   },
+  "mounts": [
+    "source=gradle-cache,target=/home/vscode/.gradle,type=volume"
+  ],
   "postCreateCommand": "bash .devcontainer/setup-devcontainer.sh",
   "remoteUser": "vscode",
   "// comment": "This devcontainer pre-installs Java 17 and Docker-in-Docker. The remoteUser sets the default user for the container. The setup script builds the project to pre-download dependencies and populate the build cache, reducing initial build time for Copilot agents from 5+ minutes to under 1 minute"