chore: Setup postgres for github action

Author: jackboberg

.github/workflows/mix-test.yml

@@ -12,6 +12,20 @@ jobs:
     name: Build and test
     runs-on: ubuntu-latest
 
+    services:
+      postgres:
+        image: postgres
+        env:
+          POSTGRES_PASSWORD: postgres
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
+
+
     steps:
     - uses: actions/checkout@v2
     - name: Set up Elixir