Refactor handling of ENV vars in postgres workflow

Author: aaronskiba

.github/workflows/postgres.yml

@@ -27,6 +27,7 @@ jobs:
     env:
       RAILS_ENV: test
       DATABASE_URL: postgres://postgres:@localhost:5432/roadmap_test
+      DISABLE_SPRING: 1
 
     steps:
     # Checkout the repo
@@ -79,12 +80,12 @@ jobs:
     # Initialize the DB
     - name: 'Setup Test DB'
       run: |
-        DISABLE_SPRING=1 RAILS_ENV=test bundle exec rails db:setup
-        DISABLE_SPRING=1 RAILS_ENV=test bundle exec rails db:migrate
+        bundle exec rails db:setup
+        bundle exec rails db:migrate
 
     # Prebuild the CSS, JS and image assets
     - name: 'Compile Assets'
-      run: DISABLE_SPRING=1 bundle exec rails assets:precompile
+      run: bundle exec rails assets:precompile
 
     # Run  the unit and functional tests
     - name: 'Run Rspec Unit and Functional Tests'