init: worker docker skeleton

Dockerfile

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+FROM python:3.11-slim
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt || true
+COPY worker.py .
+ENV POLL_INTERVAL_SECONDS=5
+CMD ["python", "worker.py"]

worker.py

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+import time, os
+
+POLL = int(os.getenv("POLL_INTERVAL_SECONDS", "5"))
+
+def main():
+    print("worker starting...")
+    while True:
+        print("tick")
+        time.sleep(POLL)
+
+if __name__ == "__main__":
+    main()