chore: add .gitignore and README

Infrastructure files for staging deployment pipeline.
The post-receive hook on the staging server will build and
deploy automatically when PRs are merged to main.

Made-with: Cursor

.gitignore

@@ -0,0 +1,28 @@
+# Environment files — never commit secrets
+.env
+.env.*
+!.env.example
+
+# Python
+__pycache__/
+*.py[cod]
+*.pyo
+.venv/
+venv/
+env/
+*.egg-info/
+dist/
+build/
+
+# Poetry
+poetry.lock
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+
+# Docker
+*.tar