add ephemeral to runner config

images/github-runner/Dockerfile

@@ -77,7 +77,7 @@ RUN useradd -m runner \
 
 # Build args
 ARG TARGETPLATFORM=amd64
-ARG RUNNER_VERSION=2.302.4
+ARG RUNNER_VERSION=2.302.5
 WORKDIR /runner
 
 # Runner download supports amd64 as x64

images/github-runner/startup.sh

@@ -48,7 +48,9 @@ echo "Registering runner ${runner_id}"
   --url "${registration_url}" \
   --allowedauthorslist "${ALLOWEDAUTHORSLIST}" \
   --unattended \
-  --replace
+  --replace \
+  --disableupdate \
+  --ephemeral
 
 trap 'remove_runner; exit 130' SIGINT
 trap 'remove_runner; exit 143' SIGTERM