AppRunner: Include ssh client and keygen tools

Change-Id: I4ef99076df3dbf7bfeb62b60c1980c308f925e11
diff --git a/apps/app-runner/Dockerfile.hugo b/apps/app-runner/Dockerfile.hugo
index 490d5c5..4a8d4df 100644
--- a/apps/app-runner/Dockerfile.hugo
+++ b/apps/app-runner/Dockerfile.hugo
@@ -2,4 +2,7 @@
 
 ARG TARGETARCH
 
+RUN apk update
+RUN apk add openssh-keygen openssh
+
 COPY app-runner_${TARGETARCH} /usr/bin/app-runner