[Hotfix] Enable GitHub Actions for v0.4 branch and fix PostgreSQL env vars (#1184)

* move postgres folder to root

* Add .env.example file at postgresql

* change test.yml

* define env variable at workflow level

Author: bwook00

.github/workflows/test.yml

@@ -4,12 +4,19 @@ on:
   push:
     branches:
       - main
+      - v0.4
   pull_request:
     branches:
       - main
+      - v0.4
 
 env:
   OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+  POSTGRES_USER: postgres
+  POSTGRES_PASSWORD: postgres
+  POSTGRES_DB: postgres
+  POSTGRES_HOST: localhost
+  POSTGRES_PORT: 5432
 
 jobs:
   build:
@@ -18,11 +25,9 @@ jobs:
       postgres:
         image: postgres:16
         env:
-          POSTGRES_HOST: localhost
-          POSTGRES_PORT: 5432
-          POSTGRES_USER: postgres
-          POSTGRES_PASSWORD: postgres
-          POSTGRES_DB: postgres
+          POSTGRES_USER: ${{ env.POSTGRES_USER }}
+          POSTGRES_PASSWORD: ${{ env.POSTGRES_PASSWORD }}
+          POSTGRES_DB: ${{ env.POSTGRES_DB }}
         options: >-
           --health-cmd pg_isready
           --health-interval 5s

postgresql/.env.example

@@ -0,0 +1,5 @@
+POSTGRES_HOST=localhost
+POSTGRES_PORT=5432
+POSTGRES_USER=postgres
+POSTGRES_PASSWORD=postgres
+POSTGRES_DB=postgres