chore: upgrade to 0.5.0+v2026.2.0

Upgrade CryptPad from version-2025.9.0 to version-2026.2.0 and
nginx from 1.25 to 1.29. Enable healthcheck on the app service.
Update README metadata for healthcheck and backup status.

README.md

@@ -5,10 +5,10 @@
 <!-- metadata -->
 
 * **Category**: Apps
-* **Status**: 0
+* **Status**: 3
 * **Image**: cryptpad/cryptpad
-* **Healthcheck**: No
-* **Backups**: No
+* **Healthcheck**: Yes
+* **Backups**: Yes
 * **Email**: No
 * **Tests**: No
 * **SSO**: No

compose.yml

@@ -3,7 +3,7 @@ version: "3.8"
 
 services:
   app:
-    image: cryptpad/cryptpad:version-2025.9.0
+    image: cryptpad/cryptpad:version-2026.2.0
     networks:
       - backend
     environment:
@@ -33,16 +33,18 @@ services:
       labels:
         - "traefik.enable=false"
         - "coop-cloud.${STACK_NAME}.timeout=${TIMEOUT:-120}"
-        - "coop-cloud.${STACK_NAME}.version=0.4.1+version-2025.9.0"
-    # healthcheck:
-    #   test: ["CMD", "curl", "-f", "http://localhost"]
-    #   interval: 30s
-    #   timeout: 10s
-    #   retries: 10
-    #   start_period: 1m
+        - "coop-cloud.${STACK_NAME}.version=0.5.0+v2026.2.0"
+        - "backupbot.backup=true"
+        - "backupbot.backup.volumes.cryptpad_config=false"
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3000"]
+      interval: 30s
+      timeout: 10s
+      retries: 10
+      start_period: 1m
 
   web:
-    image: nginx:1.25
+    image: nginx:1.29
     configs:
       - source: nginx_conf
         target: /etc/nginx/conf.d/default.conf