Fix Jenkins compose smoke when docker CLI is missing

Bootstrap static docker binary in the pipeline; Jenkins has docker.sock
mounted but the official image does not ship the docker client.

.gitignore

@@ -1,3 +1,5 @@
 .env
 *.local
 .DS_Store
+.ci-bin/
+dist/

Jenkinsfile

@@ -25,6 +25,14 @@ pipeline {
       steps {
         sh '''
           set -euo pipefail
+          if ! command -v docker >/dev/null 2>&1; then
+            echo "Installing static docker CLI (Jenkins image has socket, not binary)..."
+            mkdir -p .ci-bin
+            curl -fsSL "https://download.docker.com/linux/static/stable/x86_64/docker-27.4.1.tgz" \
+              | tar xz --strip-components=1 -C .ci-bin docker/docker
+            chmod +x .ci-bin/docker
+            export PATH="$PWD/.ci-bin:$PATH"
+          fi
           mkdir -p dist
           sed '/exclude_from_hc:/d' docker-compose.yml > dist/docker-compose.coolify.yml
           docker compose -f dist/docker-compose.coolify.yml config -q