[docker] Create image using released packages

Before this commit, the image of Sir Mordred was
created downloading the sources of the GrimoireLab
components. With this change, the image is generated
using the packages defined for a GrimoireLab release.

Signed-off-by: Santiago Dueñas <sduenas@bitergia.com>

docker/Dockerfile

@@ -66,11 +66,11 @@ USER ${DEPLOY_USER}
 WORKDIR ${DEPLOY_USER_DIR}
 
 RUN mkdir -p ${CONF_DIR} && \
-    wget https://raw.githubusercontent.com/chaoss/grimoirelab/master/releases/${GRIMOIRELAB_RELEASE} -O ${CONF_DIR}/requirements.cfg && \
+    git clone -b ${GRIMOIRELAB_RELEASE} --depth 1 https://github.com/grimoirelab/grimoirelab.git && \
+    cp grimoirelab/requirements.txt ${CONF_DIR}/requirements.txt && \
     echo ${GRIMOIRELAB_RELEASE} > ${DEPLOY_USER_DIR}/release && \
-    git clone https://github.com/grimoirelab/grimoirelab.git --depth 1 && \
     echo "Installing and checking GrimoireLab Release"
-RUN  sudo grimoirelab/utils/build_grimoirelab --build --install --check --install_system --relfile ${CONF_DIR}/requirements.cfg -l debug
+RUN sudo pip install -r ${CONF_DIR}/requirements.txt
 
 HEALTHCHECK --interval=60s --timeout=6s --retries=1 CMD healthcheck.py -c ${CONF_DIR}/setup.cfg -s 'Exception in Task Manager' || exit 1