feat(gateway): native image

[simonhir]

Description

Add native image support to gateway.

References

Issues closes #29
it-at-m/appswitcher-server#27

[simonhir]

Relevant change from Spring 3.4 https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-3.4-Release-Notes#netty-in-native-image

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[simonhir]

Only build image on main

[devtobi]

Note: With Spring 3.5, this might be relevant: https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-3.5-Release-Notes#native-test-with-maven

[simonhir]

Add release

[simonhir]

add image for all profiles and document why (Profile can't be changed)

[devtobi]

This could also be relevant from the Spring 3.5 release notes: - The java.home system property is no longer used when running in native image. (Spring 3.5 Miscellaneous)

[simonhir]

This could also be relevant from the Spring 3.5 release notes: https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-3.5-Release-Notes#docker-config-authentication

[simonhir]

Following build error comes from podman server version below 5.4.2 (see spring-projects/spring-boot#45233)

[creator]     unable to remove /workspace/BOOT-INF
[INFO]     [creator]     unlinkat /workspace/BOOT-INF: permission denied
[INFO]     [creator]     Timer: Builder ran for 6m59.500801648s and ended at 2025-08-13T08:41:53Z
[INFO]     [creator]     ERROR: failed to build: exit status 1

podman info shows client version under Client: and server version under version:. Both needs to be (at least) 5.4.2.
Currently the server version for us is 5.3.1 so this is currently blocked.