feat(container): add Docker deployment and terminal shell fallback (#520)

* feat(container): add Docker deployment and terminal shell fallback

Add Docker runtime assets (Dockerfile, compose file, and entrypoint) to run OpenChamber in containers with persistent config/data mounts.

Improve terminal PTY startup reliability by probing multiple shell candidates and falling back automatically across Unix and Windows environments.

* fix: add OMO install env

* docs: add Docker Compose instructions to README

.dockerignore

@@ -0,0 +1,20 @@
+.git
+.gitignore
+node_modules
+**/node_modules
+dist
+**/dist
+build
+**/build
+.DS_Store
+.idea
+.vscode
+coverage
+tmp
+logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+.env
+.env.*