Skip tests during image build and download dependencies

Dockerfile

@@ -1,4 +1,4 @@
-FROM ghcr.io/graalvm/jdk-community:23 AS build
+FROM ghcr.io/graalvm/native-image-community:23 AS build
 
 WORKDIR /app
 
@@ -10,10 +10,12 @@ COPY .mvn ./.mvn
 COPY src ./src
 COPY openapi.yml .
 
-RUN ./mvnw -Pnative native:compile
+RUN ./mvnw -Pnative native:compile -Dmaven.test.skip=true
 
 FROM alpine
 
+RUN apk add --no-cache libc6-compat
+
 WORKDIR /app
 
 COPY --from=build /app/target/swisssign-challenge /app/swisssign-challenge