Release v0.3.0

Features

• add locale support for frontend
• add a script for database seeding with mock data
• use GET for health check endpoint instead of HEAD
• set explicit pool limits and fail fast instead of letting requests pile up
• add datetime fields for filtering items and users by creation date

Fixes

• convert DB routes to sync handlers to match a sync version of SQLAlchemy
• improve code style : remove redundant doc strings, spacing

Testing

• arrange setting environment variables for unit tests

Chores

• update minor version for some frontend dependencies