remove files specific to abra, rename yml to yaml

compose.postgres.yaml

@@ -0,0 +1,37 @@
+version: '3.8'
+
+services:
+  app:
+    environment:
+      - POSTGRES_HOST=db
+      - POSTGRES_DB=nextcloud
+      - POSTGRES_USER=nextcloud
+      - POSTGRES_PASSWORD_FILE=/run/secrets/db_password
+      - NEXTCLOUD_UPDATE=1
+
+  db:
+    image: "postgres:12"
+    volumes:
+      - "postgres:/var/lib/postgresql/data"
+    networks:
+      - internal
+    environment:
+      POSTGRES_USER: nextcloud
+      POSTGRES_PASSWORD_FILE: /run/secrets/db_password
+      POSTGRES_DB: nextcloud
+    secrets:
+      - db_password
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready", "-U", "nextcloud"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    deploy:
+      labels:
+            backupbot.backup: "true"
+            backupbot.backup.pre-hook: "PGPASSWORD=$$(cat $${POSTGRES_PASSWORD_FILE}) pg_dump -U $${POSTGRES_USER} $${POSTGRES_DB} > /var/lib/postgresql/data/backup.sql"
+            backupbot.backup.post-hook: "rm -rf /var/lib/postgresql/data/backup.sql"
+            backupbot.backup.path: "/var/lib/postgresql/data/"
+
+volumes:
+  postgres: