Draft: Fix pipenv but keep Python 3.9

Closes #80

.gitlab/ci/build-deploy.gitlab-ci.yml

@@ -5,6 +5,8 @@
 
 build-deploy:dep:
   stage: build-deploy:dep
+  tags:
+    - rse
   image: docker:19.03.12
   variables:
     DOCKER_FILE: build/docker/dep/Dockerfile
@@ -23,6 +25,8 @@ build-deploy:dep:
 
 build-deploy:dep-dev:
   stage: build-deploy:dep
+  tags:
+    - rse
   image: docker:19.03.12
   variables:
     DOCKER_FILE: build/docker/dep/Dockerfile
@@ -42,6 +46,8 @@ build-deploy:dep-dev:
 
 build-deploy:dev:
   stage: build-deploy
+  tags:
+    - rse
   image: docker:19.03.12
   dependencies:
     - build-deploy:dep-dev
@@ -63,6 +69,8 @@ build-deploy:dev:
 
 build-deploy:production:
   stage: build-deploy
+  tags:
+    - rse
   image: docker:19.03.12
   dependencies:
     - build-deploy:dep