chore(keycloakify): slight refactor of version targeting

Using the vitest.config.ts route means we notice more quickly (through ts errors) if something in the interface changes.

keycloak/keycloakify/Dockerfile

@@ -2,7 +2,6 @@ ARG NODE_VERSION=22
 FROM node:${NODE_VERSION}-bookworm AS builder
 
 ARG KEYCLOAK_ORCID_VERSION=1.3.0
-ARG KEYCLOAK_MAJOR_VERSION=24
 
 USER root
 
@@ -20,16 +19,9 @@ RUN yarn install --immutable && \
 COPY . .
 RUN yarn build-keycloak-theme
 
-RUN if [ "$KEYCLOAK_MAJOR_VERSION" -le 25 ]; then \
-        mv dist_keycloak/keycloak-theme-for-kc-22-to-25.jar loculus-theme.jar; \
-    else \
-        mv dist_keycloak/keycloak-theme-for-kc-all-other-versions.jar loculus-theme.jar; \
-    fi
-# You can set an explicit version in vite.config.ts, see docs here:
-# https://docs.keycloakify.dev/targeting-specific-keycloak-versions
-# But for now this was the easiest way; In the future once we migrated away from KC<25 we can just get rid if this entirely
+RUN mv dist_keycloak/loculus-theme.jar loculus-theme.jar;
 
-FROM alpine:3.19
+FROM alpine:3.20
 RUN mkdir /output
 COPY --from=builder /app/keycloak-orcid*.jar /output/
 COPY --from=builder /app/loculus-theme.jar /output/

keycloak/keycloakify/README.md

@@ -72,3 +72,7 @@ npm run build-keycloak-theme
 
 Note that by default Keycloakify generates multiple .jar files for different versions of Keycloak.  
 You can customize this behavior, see documentation [here](https://docs.keycloakify.dev/targeting-specific-keycloak-versions).
+
+## Maintenance notes
+
+The produced theme jars are differ for different Keycloak versions. Targeting of versions happens in `vite.config.ts`.

keycloak/keycloakify/vite.config.ts

@@ -9,6 +9,13 @@ export default defineConfig({
         keycloakify({
             accountThemeImplementation: "none",
             themeName: "loculus",
+            keycloakVersionTargets: {
+                // Keep up to date with keycloakify upgrades
+                // Requires changes for major versions of Keycloak
+                // See https://docs.keycloakify.dev/targeting-specific-keycloak-versions
+                "22-to-25": "loculus-theme.jar",
+                "all-other-versions": false
+            },
             environmentVariables: [
                 { name: "PROJECT_NAME", default: "Loculus" },
                 { name: "REGISTRATION_TERMS_MESSAGE", default: "" }