feat: add restic (#1044)

* feat: add restic

allows incremental snapshot backups
remove custom push-backup script

* ci: remove .git dir to skip fetch_details_from_tag

fixes https://github.com/frappe/frappe_docker/actions/runs/3938883301/jobs/6738091655

docs/backup-and-push-cronjob.md

@@ -5,40 +5,34 @@ Create backup service or stack.
 version: "3.7"
 services:
   backup:
-    image: frappe/erpnext:v14
+    image: frappe/erpnext:${VERSION}
     entrypoint: ["bash", "-c"]
-    command: |
-      for SITE in $(/home/frappe/frappe-bench/env/bin/python -c "import frappe;print(' '.join(frappe.utils.get_sites()))")
-      do
-        bench --site $SITE backup --with-files
-        push-backup \
-          --site $SITE \
-          --bucket $BUCKET_NAME \
-          --region-name $REGION \
-          --endpoint-url $ENDPOINT_URL \
-          --aws-access-key-id $ACCESS_KEY_ID \
-          --aws-secret-access-key $SECRET_ACCESS_KEY
-      done
+    command:
+      - |
+        bench backup-all-sites
+        ## Uncomment following to snapshot sites
+        # restic snapshots || restic init
+        # restic backup sites
     environment:
-      - BUCKET_NAME=erpnext
-      - REGION=us-east-1
-      - ACCESS_KEY_ID=RANDOMACCESSKEY
-      - SECRET_ACCESS_KEY=RANDOMSECRETKEY
-      - ENDPOINT_URL=https://endpoint.url
+      # Set correct environment variables for restic
+      - RESTIC_REPOSITORY=s3:https://s3.endpoint.com/restic
+      - AWS_ACCESS_KEY_ID=access_key
+      - AWS_SECRET_ACCESS_KEY=secret_access_key
+      - RESTIC_PASSWORD=restic_password
     volumes:
-      - "sites-vol:/home/frappe/frappe-bench/sites"
+      - "sites:/home/frappe/frappe-bench/sites"
     networks:
       - erpnext-network
 
 networks:
   erpnext-network:
     external: true
-    name: <your_frappe_docker_project_name>_default
+    name: ${PROJECT_NAME:-erpnext}_default
 
 volumes:
-  sites-vol:
+  sites:
     external: true
-    name: <your_frappe_docker_project_name>_sites-vol
+    name: ${PROJECT_NAME:-erpnext}_sites
 ```
 
 In case of single docker host setup, add crontab entry for backup every 6 hours.
@@ -47,6 +41,13 @@ In case of single docker host setup, add crontab entry for backup every 6 hours.
 0 */6 * * * /usr/local/bin/docker-compose -f /path/to/backup-job.yml up -d > /dev/null
 ```
 
+Or
+
+```
+0 */6 * * * docker compose -p erpnext exec backend bench backup-all-sites > /dev/null
+```
+
 Notes:
 
 - Change the cron string as per need.
+- In case of docker compose exec set the correct project name