diff --git a/README.md b/README.md
index 671da4c..7c91768 100644
--- a/README.md
+++ b/README.md
@@ -111,3 +111,9 @@ volumes:
   - name: runner-dir
     emptyDir: {}
 ```
+
+## Build the runner on macos
+
+```
+cd runner && docker buildx build --platform linux/amd64 --push -t edp.buildth.ing/devfw-cicd/ubuntu-host-runner:$(date --utc --iso-8601) .
+ ```
diff --git a/runner/entrypoint.sh b/runner/entrypoint.sh
index 7576b45..52cf182 100755
--- a/runner/entrypoint.sh
+++ b/runner/entrypoint.sh
@@ -23,6 +23,35 @@ if [ -z "$CALLBACK_URL" ]; then
     exit 1
 fi
 
+if [ -z "$GITHUB_URL" ]; then
+    echo "GITHUB_URL is not set"
+    exit 1
+fi
+
+if [ -z "$RUNNER_NAME" ]; then
+    echo "RUNNER_NAME is not set"
+    exit 1
+fi
+
+if [ -z "$BEARER_TOKEN" ]; then
+    echo "BEARER_TOKEN is not set"
+    exit 1
+fi
+
+function success() {
+    MSG="$1"
+    ID=${2:-null}
+
+    call "{\"status\": \"idle\", \"message\": \"$MSG\", \"agent_id\": $ID}"
+}
+
+function call() {
+    PAYLOAD="$1"
+    local cb_url=$CALLBACK_URL
+    [[ $cb_url =~ ^(.*)/status(/)?$ ]] || cb_url="${cb_url}/status"
+    curl --retry 5 --retry-delay 5 --retry-connrefused --fail -s -X POST -d "${PAYLOAD}" -H 'Accept: application/json' -H "Authorization: Bearer ${BEARER_TOKEN}" "${cb_url}" || echo "failed to call home: exit code ($?)"
+}
+
 # retrieve runner secret from garm
 RUNNER_SECRET=$(curl --retry 5 --retry-delay 5 --retry-connrefused --fail -v -X GET -H 'Accept: application/json' -H "Authorization: Bearer ${BEARER_TOKEN}" "${METADATA_URL}/runner-registration-token/")
 
@@ -36,6 +65,8 @@ forgejo-runner \
 
 forgejo-runner generate-config > config.yml;
 
+success "runner should be working"
+
 unset RUNNER_SECRET
 unset BEARER_TOKEN