Align runtime with platform demo strategy

Dockerfile

@@ -9,15 +9,12 @@ WORKDIR /app
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY app.py modelhub_pipeline_resumable.py ./
-RUN mkdir -p /app/pipeline_outputs \
-    && chown -R 10001:0 /app
-
-USER 10001
+COPY . .
+RUN mkdir -p /app/pipeline_outputs
 
 EXPOSE 8080
 
 HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
     CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8080/health', timeout=2).read()"
 
-CMD ["python", "app.py"]
+CMD ["python", "main.py"]