Add Docker stack, Reverb live progress, and duplicate upload detection.

Ship FrankenPHP Compose services with Reverb WebSockets for real-time transcription status, skip re-uploading identical audio via content hash, and format disk usage without requiring intl.

.dockerignore

@@ -0,0 +1,32 @@
+.git
+.gitattributes
+.github
+.idea
+.vscode
+.cursor
+.claude
+.ai
+node_modules
+vendor
+public/build
+public/hot
+storage/app/private/**
+storage/app/public/**
+storage/logs/**
+storage/framework/cache/**
+storage/framework/sessions/**
+storage/framework/views/**
+database/*.sqlite*
+.env
+.env.*
+!.env.example
+.phpunit.result.cache
+Homestead.json
+Homestead.yaml
+auth.json
+npm-debug.log
+yarn-error.log
+tests
+docs
+*.md
+!README.md