Add unit test workflow configuration

.github/workflows/unit_tests.yml

@@ -0,0 +1,64 @@
+---
+name: Unit Tests
+
+on:
+  push:
+    branches:
+      - main
+      - development
+  pull_request:
+    branches:
+      - main
+      - development
+
+jobs:
+  rspec:
+    name: Unit Tests with RSepc
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: read
+    env:
+      RAILS_ENV: development
+      RAILS_MAX_THREADS: 2
+      WEB_CONCURRENCY: 2
+      PGPASSFILE: /app/.pgpass
+      POSTGRES_PASSWORD: ephermeral_exists_during_tests
+      POSTGRES_USER: admin
+      POSTGRES_DB: blackpearl
+      POSTGRES_PORT: '5432'
+      POSTGRES_MAX_CONNECTIONS: '30'
+      POSTGRES_RANDOM_PAGE_COST: '1.1'
+      POSTGRES_EFFECTIVE_IO_CONCURRENCY: '30'
+    services:
+      postgres:
+        image: postgres:latest
+        env:
+          POSTGRES_USER: admin
+          POSTGRES_PASSWORD: ephermeral_exists_during_tests
+          POSTGRES_DB: blackpearl
+        ports:
+          - 5432:5432
+        options: --health-cmd pg_isready --health-interval 5s --health-timeout 5s --health-retries 3
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Dependences
+        run: |
+          sudo apt-get update -y
+          sudo apt-get install -y libpq-dev postgresql-client build-essential libssl-dev
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.0.0
+
+      - name: Bundle Install
+        run: bundle install
+
+      - name: Database Setup
+        run: bundle exec rails db:migrate
+
+      - name: Run RSpec
+        run: bundle exec rspec