Quality life changes for teammates

[pauly-van]

• Changed root div on client from 'app' to 'entirehouse' for all service rendering.
• Conditional seeding - only seeds if database is empty.
• Icons removed locally and SVG Icons served from S3.
• Removed query function from endpoints and practice standard team format for propertyId .../:id
• database config transitioned to environment for process.env access
• added react-router-dom

@manedurphy @slava000 @jhou12