Add server dockerfile (#2602)

Co-authored-by: Taner Topal <[email protected]>

src/docker/server/Dockerfile

@@ -0,0 +1,49 @@
+# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+
+FROM ubuntu:22.04 as base
+
+ENV DEBIAN_FRONTEND noninteractive
+
+# Install system dependencies
+RUN apt-get update \
+    && apt-get -y --no-install-recommends install \
+    clang-format git unzip ca-certificates openssh-client liblzma-dev \
+    build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev wget\
+    libsqlite3-dev curl llvm libncursesw5-dev xz-utils tk-dev libxml2-dev \
+    libxmlsec1-dev libffi-dev liblzma-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install PyEnv and Python
+ARG PYTHON_VERSION
+ENV PYENV_ROOT /root/.pyenv
+ENV PATH $PYENV_ROOT/shims:$PYENV_ROOT/bin:$PATH
+RUN curl -L https://github.com/pyenv/pyenv-installer/raw/master/bin/pyenv-installer | bash
+RUN pyenv install ${PYTHON_VERSION} \
+    && pyenv global ${PYTHON_VERSION} \
+    && pyenv rehash
+
+# Install specific version of pip
+ARG PIP_VERSION
+RUN python -m pip install pip==$PIP_VERSION
+
+# Install specific version of setuptools
+ARG SETUPTOOLS_VERSION
+RUN python -m pip install setuptools==$SETUPTOOLS_VERSION
+
+# Install poetry as all examples use it and therefore it should be available for custom images
+ARG POETRY_VERSION
+RUN curl -sSL https://install.python-poetry.org | python3 - --version ${POETRY_VERSION}
+ENV PATH /root/.local/bin:$PATH
+RUN poetry config virtualenvs.create false
+
+# Server image
+FROM base as server
+
+WORKDIR /app
+ARG FLWR_VERSION
+RUN python -m pip install -U flwr[rest]==${FLWR_VERSION}
+ENTRYPOINT ["python", "-c", "from flwr.server import run_server\nrun_server()"]
+
+# Test if Flower can be successfully installed and imported
+FROM server as test
+RUN python -c "from flwr.server import run_server"