Add Kerberos libs to Dockerfile for Npgsql support (#36)

Installed krb5-libs in the Dockerfile using apk to enable Kerberos authentication for Npgsql. This ensures proper connectivity for environments requiring Kerberos.

Author: mm-hsh

source/AAS.TwinEngine.Plugin.RelationalDatabase/Dockerfile

@@ -18,6 +18,10 @@ COPY --from=build /App/sbom/bom.xml /sbom_application.cyclonedx.xml
 
 # Create final image containing application
 FROM mcr.microsoft.com/dotnet/aspnet:8.0-alpine@sha256:a0ce42fe86548363a9602c47fc3bd4cf9c35a2705c68cd98d7ce18ae8735b83c
+
+# Install Kerberos libraries required by Npgsql
+RUN apk add --no-cache krb5-libs
+
 USER app
 WORKDIR /App
 COPY --from=build /App/out .