fix: Make host.docker.internal available on linux

[sebastianliebscher]

SUMMARY

#25346 introduced an nginx container which uses host.docker.internal. Unfortunately, this is not available on Linux. This can be solved with the use of extra-hosts in docker-compose.yml.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

Fixes the following error:

superset_nginx         | 2023/10/06 07:02:12 [emerg] 1#1: host not found in upstream "host.docker.internal:8088" in /etc/nginx/nginx.conf:94
superset_nginx         | nginx: [emerg] host not found in upstream "host.docker.internal:8088" in /etc/nginx/nginx.conf:94

TESTING INSTRUCTIONS

• docker-compose up and check the nginx container logs
• ping host.docker.internal from nginx container

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API