chore: add dockerignore for hub services

Exclude secrets (.env*, *.pem/key/token), VCS metadata, and language
build caches (Python pyc/.venv, Node node_modules/dist) from the
docker build context for hub-api and hub-web.

hub-api/.dockerignore

@@ -0,0 +1,23 @@
+# secrets
+.env
+.env.*
+!.env.example
+*.pem
+*.key
+*.token
+id_rsa*
+credentials.env*
+
+# version control / dev
+.git/
+.gitignore
+.dockerignore
+README.md
+
+# python
+__pycache__/
+*.pyc
+*.pyo
+.pytest_cache/
+.venv/
+venv/

hub-web/.dockerignore

@@ -0,0 +1,24 @@
+# secrets
+.env
+.env.*
+!.env.example
+*.pem
+*.key
+*.token
+
+# version control / dev
+.git/
+.gitignore
+.dockerignore
+README.md
+
+# node — build cache (multi-stage final image 에 미포함이지만 build context 전송 절약)
+node_modules/
+dist/
+.next/
+.cache/
+npm-debug.log*
+
+# editor
+.vscode/
+.idea/