feat(docker): add Docker setup, environment examples, and architecture docs

.dockerignore

@@ -0,0 +1,32 @@
+# VCS
+.git
+**/.git
+
+# Editor
+.vscode
+**/.vscode
+
+# Dependencies and build output
+node_modules
+.next
+out
+build
+dist
+coverage
+
+# Runtime data and logs
+data
+logs
+
+# Local env files (inject at runtime via --env-file or -e)
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Debug logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*