ci: postgres unittests configurations (#28952)

Co-authored-by: Ankush Menat <ankush@frappe.io>

.github/workflows/server-tests-postgres.yml

@@ -0,0 +1,105 @@
+name: Server (Postgres)
+
+on:
+  pull_request:
+    paths-ignore:
+      - '**.js'
+      - '**.md'
+      - '**.html'
+    types: [opened, labelled, synchronize, reopened]
+
+concurrency:
+  group: server-postgres-develop-${{ github.event.number }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    if: ${{ contains(github.event.pull_request.labels.*.name, 'postgres') }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+
+    strategy:
+      fail-fast: false
+      matrix:
+       container: [1, 2, 3]
+
+    name: Python Unit Tests
+
+    services:
+      postgres:
+        image: postgres:13.3
+        env:
+          POSTGRES_PASSWORD: travis
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
+
+    steps:
+
+      - name: Clone
+        uses: actions/checkout@v2
+
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.7
+
+      - name: Setup Node
+        uses: actions/setup-node@v2
+        with:
+          node-version: 14
+          check-latest: true
+
+      - name: Add to Hosts
+        run: echo "127.0.0.1 test_site" | sudo tee -a /etc/hosts
+
+      - name: Cache pip
+        uses: actions/cache@v2
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+            ${{ runner.os }}-
+
+      - name: Cache node modules
+        uses: actions/cache@v2
+        env:
+          cache-name: cache-node-modules
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+
+      - uses: actions/cache@v2
+        id: yarn-cache
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+
+
+      - name: Install
+        run: bash ${GITHUB_WORKSPACE}/.github/helper/install.sh
+        env:
+          DB: postgres
+          TYPE: server
+
+      - name: Run Tests
+        run: cd ~/frappe-bench/ && bench --site test_site run-parallel-tests --app erpnext --use-orchestrator
+        env:
+          TYPE: server
+          CI_BUILD_ID: ${{ github.run_id }}
+          ORCHESTRATOR_URL: http://test-orchestrator.frappe.io