大家好，我最近在自己的业余项目里尝试把uv和Docker结合起来用，跟着官方示例改了Dockerfile，只调整了CMD部分指向我的main文件，结果运行容器的时候遇到了问题，想请大家帮忙排查下哪里出错了！

我的Dockerfile内容如下：

# Dockerfile

FROM ghcr.io/astral-sh/uv:python3.12-bookworm-slim AS builder
ENV UV_COMPILE_BYTECODE=1 UV_LINK_MODE=copy
WORKDIR /app
RUN --mount=type=cache,target=/root/.cache/uv \
    --mount=type=bind,source=uv.lock,target=uv.lock \
    --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
    uv sync --frozen --no-install-project --no-dev
ADD . /app
RUN --mount=type=cache,target=/root/.cache/uv \
    uv sync --frozen --no-dev

FROM python:3.12-slim-bookworm

# Copy the application from the builder
COPY --from=builder --chown=app:app /app /app

# Place executables in the environment at the front of the path
ENV PATH="/app/.venv/bin:$PATH"

# Run the FastAPI application by default
CMD ["fastapi", "dev", "--host", "0.0.0.0", "main"]

这是我的pyproject.toml配置：

[project]
name = "backend"
version = "0.1.0"
description = "Add your description here"
readme = "README.md"
requires-python = ">=3.10"
dependencies = [
    "fastapi[standard]>=0.115.6",
    "pydantic-settings>=2.7.1",
    "sqlalchemy>=2.0.37",
    "uvicorn>=0.34.0",
    "websockets>=14.1",
]

[dependency-groups]
dev = ["pytest>=8.3.4"]

[tool.uv]
dev-dependencies = ["ruff>=0.6.2", "fastapi-cli>=0.0.5"]

我的项目目录结构是这样的：

.
├── backend
│   ├── main.py
│   ├── Dockerfile
│   ├── pyproject.toml
│   ├── uv.lock
│   ├── app
│   │   ├──etc...

main.py里包含了FastAPI的app实例。

当我构建并运行容器时，收到了如下错误提示：

Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: "fastapi": executable file not found in $PATH: unknown

我检查过PATH的设置，明明已经把虚拟环境的bin目录放到了最前面，但还是找不到fastapi命令。有没有大佬能帮我找出问题所在呀？

备注：内容来源于stack exchange，提问作者kamagitheboilerman