chore(ci): adding a dockerfile to install, build and run unit tests

Signed-off-by: Raphael Defosseux <raphael.defosseux@openairinterface.org>

build/common/Dockerfile.unit-tests.ubuntu

+#/*
+# * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+# * contributor license agreements.  See the NOTICE file distributed with
+# * this work for additional information regarding copyright ownership.
+# * The OpenAirInterface Software Alliance licenses this file to You under
+# * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+# * except in compliance with the License.
+# * You may obtain a copy of the License at
+# *
+# *      http://www.openairinterface.org/?page_id=698
+# *
+# * Unless required by applicable law or agreed to in writing, software
+# * distributed under the License is distributed on an "AS IS" BASIS,
+# * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# * See the License for the specific language governing permissions and
+# * limitations under the License.
+# *-------------------------------------------------------------------------------
+# * For more information about the OpenAirInterface (OAI) Software Alliance:
+# *      contact@openairinterface.org
+# */
+#---------------------------------------------------------------------
+#
+# Dockerfile for the Open-Air-Interface AMF service
+#   Valid for Ubuntu-20.04 (focal),
+#             Ubuntu-22.04 (jammy)
+#
+#---------------------------------------------------------------------
+
+#---------------------------------------------------------------------
+# BASE IMAGE
+#---------------------------------------------------------------------
+ARG BASE_IMAGE=ubuntu:jammy
+FROM $BASE_IMAGE as common-src-unit-tests
+
+ENV DEBIAN_FRONTEND=noninteractive
+ENV TZ=Europe/Paris
+ENV IS_DOCKERFILE=1
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get upgrade --yes && \
+    DEBIAN_FRONTEND=noninteractive apt-get install --yes \
+        git \
+        build-essential \
+        cmake \
+        make \
+        libasio-dev \
+        libboost-all-dev \
+        libasan6 \
+        googletest-tools \
+        libgoogle-glog-dev \
+        libgtest-dev \
+        libtool \
+        libfmt-dev \
+        libspdlog-dev \
+        nlohmann-json3-dev \
+        libyaml-cpp-dev \
+        pkg-config
+
+ENV OPENAIRCN_DIR=/openair-unit-tests
+WORKDIR /openair-unit-tests
+COPY . /openair-unit-tests
+
+# Building all unit-tests
+WORKDIR /openair-unit-tests/build/common/_build
+RUN cmake .. \
+      -DCMAKE_BUILD_TYPE=Release \
+      -DBUILD_SHARED_LIBS=OFF && \
+    make -j`nproc` all
+
+# Running all unit-tests
+WORKDIR /openair-unit-tests/build/common/_build/test
+RUN ctest -V