Fix: [AEA-0000] - rollback hapi fhir upgrade (#223)

## Summary

- Routine Change

### Details

- rollback fhir upgrade
- use latest java and alpine images

Dockerfile

@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1
-FROM eclipse-temurin:21.0.2_13-jdk-alpine AS jre-build
+FROM eclipse-temurin:23.0.1_11-jdk-alpine-3.21 AS jre-build
 RUN apk update; \
     apk upgrade
 
@@ -27,7 +27,7 @@ RUN jlink \
     --output /javaruntime
 
 # now actually create the runtime image we want
-FROM alpine:3.19.1 AS runtime
+FROM alpine:3.21.2 AS runtime
 RUN apk update; \
     apk upgrade
 ENV JAVA_HOME=/opt/java/openjdk

pom.xml

@@ -26,7 +26,7 @@
         <maven.compiler.source>21</maven.compiler.source>
         <maven.compiler.target>21</maven.compiler.target>
         <kotlin.version>2.1.10</kotlin.version>
-        <fhir.version>7.6.1</fhir.version>
+        <fhir.version>5.4.2</fhir.version>
         <fasterxml.version>2.18.2</fasterxml.version>
         <sonar.organization>nhsdigital</sonar.organization>
         <sonar.projectKey>NHSDigital_validation-service-fhir-r4</sonar.projectKey>
@@ -127,11 +127,14 @@
             <artifactId>hapi-fhir-validation-resources-r4</artifactId>
             <version>${fhir.version}</version>
         </dependency>
+        <!-- 
+            only needed for later fhir-hapi
         <dependency>
             <groupId>ca.uhn.hapi.fhir</groupId>
             <artifactId>hapi-fhir-caching-caffeine</artifactId>
             <version>${fhir.version}</version>
         </dependency>
+        -->
         <dependency>
             <groupId>io.github.oshai</groupId>
             <artifactId>kotlin-logging-jvm</artifactId>

src/main/kotlin/com/example/fhirvalidator/configuration/ValidationConfiguration.kt

@@ -63,7 +63,9 @@ class ValidationConfiguration(private val implementationGuideParser: Implementat
                 theDisplay: String?,
                 theValueSet: IBaseResource
             ): IValidationSupport.CodeValidationResult? {
-                val valueSetUrl = CommonCodeSystemsTerminologyService.getValueSetUrl(fhirContext, theValueSet)
+                // this is needed for later version of hapi-fhir
+                // val valueSetUrl = CommonCodeSystemsTerminologyService.getValueSetUrl(fhirContext, theValueSet)
+                val valueSetUrl = CommonCodeSystemsTerminologyService.getValueSetUrl(theValueSet)
 
                 if (valueSetUrl == "https://fhir.nhs.uk/ValueSet/NHSDigital-MedicationRequest-Code"
                     || valueSetUrl == "https://fhir.nhs.uk/ValueSet/NHSDigital-MedicationDispense-Code"