Update backend.loc / Websocket reverse proxy management

[mngoe]

Description

This PR adds WebSocket support to the nginx reverse proxy configuration for the backend API location.

The nginx proxy configuration has been updated to properly handle WebSocket connections by:

• Enabling HTTP/1.1 protocol (required for WebSocket handshake)
• Forwarding Upgrade and Connection headers for WebSocket negotiation
• Setting an extended read timeout (24 hours) to prevent WebSocket connections from timing out

This enables real-time bidirectional communication between the frontend and backend, which is essential for features requiring instant updates without polling (e.g., notifications, live data feeds, video stream management, Claim AI module).

Type of Change

• Feature
• Bug fix
• Chore (Refactor, Docs, CI/CD)
• Other, please specify

Related Issue(s) / Task(s)

• Requires [link to github PR], [link to github PR] needs to be merged first before this one
• Relates to [link to github PR], this needs to be merged before [link to github PR]
• External reference (e.g., Jira): [Add reference if applicable]

Technical Details

Modified file: openimis-dist_dkr/conf/nginx/locations/backend.loc

Changes made:

1. Added proxy_http_version 1.1; - WebSocket requires HTTP/1.1
2. Added proxy_set_header Upgrade $http_upgrade; - Forwards upgrade header
3. Added proxy_set_header Connection "upgrade"; - Sets connection upgrade mode
4. Added proxy_read_timeout 86400; - 24-hour timeout for persistent connections

Testing

After deployment, WebSocket connections can be tested by:

1. Verifying nginx configuration: nginx -t
2. Reloading nginx: nginx -s reload
3. Testing WebSocket endpoint connectivity from the frontend
4. Confirming persistent connections remain active without timeout

Demo

N/A - Infrastructure configuration change

Checklist

• Unit tests added/modified - N/A (nginx configuration)
• I18n / translation handled - N/A (nginx configuration)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud