Update optimization recommendations and runner configurations to utilize official Docker images for Java, Python, Node.js, and security tools; enhance documentation for clarity on available images and their benefits.

docs/OPTIMIZATION_RECOMMENDATIONS.md

@@ -34,21 +34,21 @@ Instead of full Ubuntu latest, use optimized images from [Gitea's runner-images]
 
 ```yaml
 # Heavy Runner - Java workloads
-- "java:docker://docker.gitea.com/runner-images:ubuntu-22.04-java17-maven"
-- "heavy:docker://docker.gitea.com/runner-images:ubuntu-22.04-java17-maven"
+- "java:docker://openjdk:17-jdk-slim"
+- "heavy:docker://openjdk:17-jdk-slim"
 
 # Heavy Runner - Python workloads  
-- "python:docker://docker.gitea.com/runner-images:ubuntu-22.04-python3.11"
+- "python:docker://python:3.11-slim"
 
 # Light Runner - Node.js workloads
-- "nodejs:docker://docker.gitea.com/runner-images:ubuntu-22.04-node20"
-- "frontend:docker://docker.gitea.com/runner-images:ubuntu-22.04-node20"
+- "nodejs:docker://node:20-slim"
+- "frontend:docker://node:20-slim"
 
 # Docker Runner - Docker-in-Docker
-- "docker:docker://docker.gitea.com/runner-images:ubuntu-22.04-docker"
+- "docker:docker://docker:24-dind"
 
 # Security Runner - Security tools
-- "security:docker://docker.gitea.com/runner-images:ubuntu-22.04-security"
+- "security:docker://alpine:3.19"
 ```
 
 ### 2. Benefits of Specialized Images
@@ -141,32 +141,31 @@ Savings: 50s per job (42% faster)
 - [ ] Fine-tune based on metrics
 - [ ] Update documentation
 
-## Available Gitea Runner Images
+## Available Docker Images
 
-Check [Gitea's runner-images repository](https://gitea.com/docker.gitea.com/runner-images) for available images:
+**Note**: Gitea doesn't provide a comprehensive set of specialized runner images. We use official, well-maintained Docker images instead:
 
-### Java Images:
-- `ubuntu-22.04-java17-maven`
-- `ubuntu-22.04-java21-maven`
-- `ubuntu-22.04-java17-gradle`
+### Official Docker Images Used:
 
-### Python Images:
-- `ubuntu-22.04-python3.11`
-- `ubuntu-22.04-python3.12`
-- `ubuntu-22.04-python3.11-pip`
+#### Java Images:
+- `openjdk:17-jdk-slim` - OpenJDK 17 with Debian slim base
+- `openjdk:21-jdk-slim` - OpenJDK 21 with Debian slim base
 
-### Node.js Images:
-- `ubuntu-22.04-node18`
-- `ubuntu-22.04-node20`
-- `ubuntu-22.04-node21`
+#### Python Images:
+- `python:3.11-slim` - Python 3.11 with Debian slim base
+- `python:3.12-slim` - Python 3.12 with Debian slim base
 
-### Docker Images:
-- `ubuntu-22.04-docker`
-- `ubuntu-22.04-docker-compose`
+#### Node.js Images:
+- `node:20-slim` - Node.js 20 with Debian slim base
+- `node:18-slim` - Node.js 18 with Debian slim base
 
-### Security Images:
-- `ubuntu-22.04-security`
-- `ubuntu-22.04-trivy`
+#### Docker Images:
+- `docker:24-dind` - Docker-in-Docker with Alpine base
+- `docker:24-dind-rootless` - Rootless Docker-in-Docker
+
+#### Security Images:
+- `alpine:3.19` - Minimal Alpine Linux for security tools
+- `alpine:latest` - Latest Alpine Linux
 
 ## Next Steps