Adapt postgres-baskup-s3 to backup Docker volumes instead of Postgres databases

docker-compose.yaml

@@ -1,28 +1,19 @@
-# this file is here to facilitate development/testing
+# This file is here to facilitate development/testing.
+# See the readme for a list of configuration options.
+# Copy the .env.example and add in your S3 credentials.
 # $ docker compose up -d --build --force-recreate
 
 services:
-  postgres:
-    image: postgres:14
-    environment:
-      POSTGRES_USER: user
-      POSTGRES_PASSWORD: password
+  test:
+    build: test_image
+    volumes:
+      - data:/data
 
   backup:
-    build:
-      context: .
-      args:
-        ALPINE_VERSION: '3.16'
+    build: .
+    env_file: .env
     environment:
-      SCHEDULE: '@weekly'     # optional
-      BACKUP_KEEP_DAYS: 7     # optional
-      PASSPHRASE: passphrase  # optional
-      S3_REGION:
-      S3_ACCESS_KEY_ID:
-      S3_SECRET_ACCESS_KEY:
-      S3_BUCKET:
-      S3_PREFIX: backup
-      POSTGRES_HOST: postgres
-      POSTGRES_DATABASE: postgres
-      POSTGRES_USER: user
-      POSTGRES_PASSWORD: password
+      SCHEDULE: '* * * * *'
+      BACKUP_KEEP_DAYS: 7
+      PASSPHRASE: passphrase
+      S3_PREFIX: backup-test