Add Test job

.gitlab-ci.yml

@@ -1,5 +1,6 @@
 stages:
   - build
+  - test
 
 buiild job:
   stage: build
@@ -13,4 +14,17 @@ buiild job:
     - pip3 install --upgrade setuptools
     - pip3 install Flask gunicorn pytest pytest-cov
     - pip3 install pendulum
+
+test job:
+  stage: test
+  image: python:3-buster
+  script:
+    - export PYTHONPATH=.
+    - export FLASK_APP=period
+    - apt-get update -qy
+    - apt-get install -y python3-dev python3-pip
+    - pip3 install --upgrade pip
+    - pip3 install --upgrade setuptools
+    - pip3 install Flask gunicorn pytest pytest-cov
+    - pip3 install pendulum
     - pytest tests --cov --cov-report term --cov-report html