Add Dockerfile for comps-base image (#1127)

Signed-off-by: Eero Tamminen <eero.t.tamminen@intel.com>

Author: eero-t

Dockerfile

@@ -0,0 +1,37 @@
+# Copyright (C) 2025 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+# Base image for GenAIComps based OPEA Python applications
+# Build: docker build -t opea/comps-base -f Dockerfile .
+
+ARG IMAGE_NAME=python
+ARG IMAGE_TAG=3.11-slim
+
+FROM ${IMAGE_NAME}:${IMAGE_TAG} AS base
+
+ENV HOME=/home/user
+
+RUN useradd -m -s /bin/bash user && \
+    mkdir -p $HOME && \
+    chown -R user $HOME
+
+# get security updates
+RUN apt-get update && apt-get upgrade -y && \
+    apt-get clean autoclean && \
+    apt-get autoremove -y && \
+    rm -rf /var/lib/apt/lists/*
+
+WORKDIR $HOME
+
+COPY *.toml *.py *.txt *.md LICENSE ./
+
+RUN pip install --no-cache-dir --upgrade pip setuptools && \
+    pip install --no-cache-dir -r requirements.txt
+
+COPY comps/ comps/
+
+ENV PYTHONPATH=$PYTHONPATH:$HOME
+
+USER user
+
+ENTRYPOINT ["sh", "-c", "set && ls -la"]