db backups

mariadb-backups/docker-compose.yaml

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+# docker-compose.yml file
+version: '3.8'
+services:
+  db:
+    image: mariadb:latest
+    restart: unless-stopped
+    environment:
+      MYSQL_ROOT_PASSWORD: example
+      MYSQL_USER: ${MYSQL_USER}
+      MYSQL_PASSWORD: ${MYSQL_PASSWORD}
+    volumes:
+      - ./data:/var/lib/mysql
+      - ./backups:/backups
+    ports:
+      - "3306:3306"
+    command: >
+      bash -c "while true; do
+        mysqldump -u root -p${MYSQL_ROOT_PASSWORD} --all-databases | gzip > /backups/db_$(date +%Y%m%d%H%M%S).sql.gz;
+        sleep 24h;
+      done"

mariadb-backups/sample.env

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+MYSQL_USER=yourusername
+MYSQL_PASSWORD=yourpassword

postgres-backup/docker-compose.yaml

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+version: '3.8'
+services:
+  db:
+    image: postgres:latest
+    restart: unless-stopped
+    environment:
+      POSTGRES_PASSWORD: example
+      POSTGRES_USER: yourusername
+      POSTGRES_DB: yourdatabase
+    volumes:
+      - ./data:/var/lib/postgresql/data
+      - ./backups:/backups
+    ports:
+      - "5432:5432"
+    command: >
+      bash -c "while true; do
+        pg_dumpall -U ${POSTGRES_USER} -f /backups/db_$(date +%Y%m%d%H%M%S).sql;
+        gzip /backups/db_$(date +%Y%m%d%H%M%S).sql;
+        sleep 24h;
+      done"