Add wait step to CI for postgres

Author: kheal

.gitlab-ci.yml

@@ -3,7 +3,7 @@ include:
 
 
 services:
-  - postgres
+  - postgres:13
 
 variables:
   POSTGRES_DB: molformula
@@ -27,6 +27,9 @@ test-source:
     - k8s 
     - rzr
     - codebuilds
+  before_script:
+    - apt-get update && apt-get install -y wait-for-it
+    - wait-for-it -t 20 postgres:5432
   script:
     - python3 -V  # Print out python version for debugging
     - python3 -m pip install --upgrade pip