feat: Add schedule for database backup

This commit adds a new schedule for database backup in the `.github/workflows/schedule-db-backup.yml` file. The backup will run every night at midnight UTC. It includes jobs to backup test, acceptance, and production environments.

.github/workflows/schedule-db-backup.yml

@@ -0,0 +1,22 @@
+name: Schedule Database Backup
+
+on:
+  schedule:
+    - cron: '0 0 * * *' # Runs every night at midnight UTC
+  workflow_dispatch:
+
+jobs:
+  backup-test:
+    uses: ./.github/workflows/templates/db-backup.yml
+    with:
+      runner: tst
+
+  backup-acceptance:
+    uses: ./.github/workflows/db-backup.yml
+    with:
+      runner: ACC
+
+  backup-production:
+    uses: ./.github/workflows/db-backup.yml
+    with:
+      runner: PRD

.github/workflows/templates/db-backup.yml

@@ -0,0 +1,25 @@
+name: Database Backup Template
+
+on:
+  workflow_call:
+    inputs:
+      runner:
+        required: true
+        type: string
+
+jobs:
+  backup:
+    runs-on: ${{ inputs.runner }}
+    steps:
+
+      - name: Set Date
+        id: date
+        run: echo "DATE=$(date +'%Y%m%d')" >> $GITHUB_ENV
+
+      - name: Backup Database
+        run: |
+          podman exec muscle_db_1 sh -c "pg_dump -Fc > /backups/${{ env.DATE }}.dump"
+
+      - name: Remove Old Backups (older than 7 days)
+        run: |
+          podman exec muscle_db_1 sh -c "find /backups -type f -name '*.dump' -mtime +7 -exec rm {} \;"