feat: add dockerfile and dockerignore, update next config

.dockerignore

@@ -0,0 +1,39 @@
+# Version control
+.git
+.gitignore
+.gitattributes
+
+# Dependencies + build artifacts (rebuilt in image)
+node_modules
+.next
+out
+dist
+.turbo
+
+# Local env files — must come from runtime, never bake into image
+.env
+.env.local
+.env.*.local
+
+# Editor / IDE
+.vscode
+.idea
+.DS_Store
+
+# Logs + caches
+*.log
+.npm
+.eslintcache
+.next/cache
+
+# Docs and meta — not needed at runtime
+README.md
+CLAUDE.md
+AGENTS.md
+docs
+
+# Docker artifacts themselves
+Dockerfile
+.dockerignore
+docker-compose.yml
+docker-compose.*.yml