Add Dockerfile for publishing support

Co-authored-by: eerhardt <8291187+eerhardt@users.noreply.github.com>

Author: Copilot

src/Aspire.ProjectTemplates/templates/aspire-py-starter/13.0/Dockerfile

@@ -0,0 +1,57 @@
+# Stage 1: Build the Vite app
+FROM node:22-slim AS frontend-stage
+
+# Set the working directory inside the container
+COPY frontend ./
+
+WORKDIR /frontend
+RUN npm install
+RUN npm run build
+
+# Stage 2: Build the Python application with UV
+FROM ghcr.io/astral-sh/uv:python3.13-bookworm-slim AS builder
+
+# Enable bytecode compilation and copy mode for the virtual environment
+ENV UV_COMPILE_BYTECODE=1
+ENV UV_LINK_MODE=copy
+
+WORKDIR /app
+
+# Install dependencies first for better layer caching
+# Uses BuildKit cache mounts to speed up repeated builds
+RUN --mount=type=cache,target=/root/.cache/uv --mount=type=bind,source=./api_service/uv.lock,target=uv.lock --mount=type=bind,source=./api_service/pyproject.toml,target=pyproject.toml \
+    uv sync --locked --no-install-project --no-dev
+
+# Copy the rest of the application source and install the project
+COPY ./api_service /app
+RUN --mount=type=cache,target=/root/.cache/uv \
+    uv sync --locked --no-dev
+
+# Stage 3: Create the final runtime image
+FROM python:3.13-slim-bookworm AS app
+
+COPY --from=frontend-stage /dist /app/static
+
+# ------------------------------
+# 🚀 Runtime stage
+# ------------------------------
+# Create non-root user for security
+RUN groupadd --system --gid 999 appuser && useradd --system --gid 999 --uid 999 --create-home appuser
+
+# Copy the application and virtual environment from builder
+COPY --from=builder --chown=appuser:appuser /app /app
+
+# Add virtual environment to PATH and set VIRTUAL_ENV
+ENV PATH=/app/.venv/bin:${PATH}
+ENV VIRTUAL_ENV=/app/.venv
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+# Use the non-root user to run the application
+USER appuser
+
+# Set working directory
+WORKDIR /app
+
+# Run the application
+ENTRYPOINT ["fastapi", "run", "app.py", "--host", "0.0.0.0", "--port", "8000"]