Update Docker image build process and add user-friendly landing page#12

byjg merged 3 commits intomasterbyjg/docker-php:masterfrom

claude/incomplete-description-01ViEV9LqsVMequN6sMDrvZFbyjg/docker-php:claude/incomplete-description-01ViEV9LqsVMequN6sMDrvZFCopy head branch name to clipboard