Add python 3.10 image and testing

.gitlab-ci.yml

@@ -255,8 +255,8 @@ pages:
   stage: deploy
   image: docker:20.10.12
   needs: ["containers"]
-  only:
-    - schedules
+  #only:
+  #  - schedules
   script:
     - cd containers
     - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
@@ -274,11 +274,10 @@ build-python39-container:
   variables:
     PYVERSION: "python39"
 
-# add back when 3.10 image is available
-#build-python310-container:
-#  <<: *build-container
-#  variables:
-#    PYVERSION: "python310"
+build-python310-container:
+  <<: *build-container
+  variables:
+    PYVERSION: "python310"
 
 pypi-release:
   stage: deploy