🔧(backend) install lxml and xmlsec from source

On bootstrap, we run into a `lxml & xmlsec libxml2 library version mismatch`
error.
Following python social auth documentation, we need to install both lxml and
xmlsec packages from source.

Author: wilbrdt

.circleci/config.yml

@@ -231,6 +231,8 @@ jobs:
         auth:
           username: $DOCKER_HUB_USER
           password: $DOCKER_HUB_PASS
+        environment:
+          PIP_NO_BINARY: lxml,xmlsec
     working_directory: ~/marsha/src/backend
     steps:
       - checkout:
@@ -602,6 +604,7 @@ jobs:
           DJANGO_MARKDOWN_ENABLED: 1
           DEBUG: pw:browser*
           BUILD_PATH: ../../../backend/marsha/static/js/build/site/
+          PIP_NO_BINARY: lxml,xmlsec
       - image: cimg/postgres:16.4
         auth:
           username: $DOCKER_HUB_USER

Dockerfile

@@ -22,9 +22,12 @@ RUN apt-get update && \
         gcc \
         libxml2-dev \
         libxmlsec1-dev \
-        libxmlsec1-openssl && \
+        libxmlsec1-openssl \
+        zlib1g-dev && \
     rm -rf /var/lib/apt/lists/*
 
+ENV PIP_NO_BINARY=lxml,xmlsec
+
 RUN mkdir /install && \
     pip install --prefix=/install .
 

src/backend/setup.cfg

@@ -70,6 +70,7 @@ install_requires =
     urllib3==2.2.3
     uvicorn[standard]==0.34.0
     whitenoise==6.8.2
+    xmlsec==1.3.15
     xmpppy==0.7.1
 
 # App BBB