also cache pip

.gitlab-ci.yml

@@ -3,6 +3,10 @@ image: debian:buster
 variables:
   TEXTA_MLP_DATA_DIR: /cache
 
+cache:
+  paths:
+    - .pip
+
 stages:
   - test
   - build
@@ -11,7 +15,7 @@ stages:
 Test:
   before_script:
     - apt-get update && apt-get install python3-lxml python3-pip -y
-    - pip3 install -r requirements.txt
+    - pip3 --cache-dir=.pip install -r requirements.txt
   stage: test
   tags:
     - ci-test