feat: Overhaul Docker infrastructure with multi-stage builds, add a cleanup script, and refactor the update service to combine update and requirement checks.

.dockerignore

@@ -0,0 +1,39 @@
+# Dependencies - handled inside container
+node_modules
+web/node_modules
+
+# Git
+.git
+.gitignore
+
+# Logs and data
+logs
+*.log
+shared/db/data
+shared/db/log
+
+# Development tools
+.env
+.env.example
+.opencode
+.agent
+
+# Documentation
+docs
+*.md
+!README.md
+
+# IDE
+.vscode
+.idea
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Build artifacts
+dist
+.cache
+*.tsbuildinfo