feat: create base Dockerfile

Author: NeoScript

Dockerfile

@@ -0,0 +1,9 @@
+FROM gcr.io/google.com/cloudsdktool/google-cloud-cli:alpine
+RUN apk --upgrade add openjdk17-jre-headless
+RUN gcloud components install beta pubsub-emulator
+
+# Expose the custom port
+EXPOSE 8090
+
+ENTRYPOINT ["gcloud", "beta", "emulators", "pubsub", "start"]
+CMD ["--host-port", "0.0.0.0:8090"]