test all updated shared runners

.gitlab-ci.yml

 stages:
   - init
+  - pre
   - test
   - pages
 
@@ -23,7 +24,49 @@ version:
     paths:
       - badges/
 
-### Tests ###
+### pretests ###
+tests1:
+  tags:
+    - mlt
+    - zam347
+  stage: pre
+  script:
+    echo "RZobXyF8 working"
+
+tests2:
+  tags:
+    - era5
+    - zam347
+  stage: pre
+  script:
+    echo "vmWZifEA working"
+
+tests3:
+  tags:
+    - gpu
+    - zam347
+  stage: pre
+  script:
+    echo "sRi9-Bvw working"
+
+tests4:
+  tags:
+    - django
+    - zam347
+  stage: pre
+  script:
+    echo "6HmDp9Qd working"
+
+tests5:
+  tags:
+    - base
+    - zam347
+  stage: pre
+  script:
+    echo "xkwF75N9 working"
+
+
+### Tests (from scratch) ###
 tests:
   tags:
     - leap