Refactoring of code to meet all go lint requirements

docs/how-tos/azure-blob.md

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+---
+title: Azure Blob storage
+layout: default
+parent: How Tos
+nav_order: 5
+---
+# Azure Blob storage
+
+{: .note }
+As described on local backup section, to change the storage of your backup and use Azure Blob as storage. You need to add `--storage azure` (-s azure).
+You can also specify a folder where you want to save you data by adding `--path my-custom-path` flag.
+
+
+## Backup to Azure Blob storage
+
+```yml
+services:
+  mysql-bkup:
+    # In production, it is advised to lock your image tag to a proper
+    # release version instead of using `latest`.
+    # Check https://github.com/jkaninda/pg-bkup/releases
+    # for a list of available releases.
+    image: jkaninda/pg-bkup
+    container_name: pg-bkup
+    command: backup --storage azure -d database --path my-custom-path
+    environment:
+      - DB_PORT=5432
+      - DB_HOST=postgres
+      - DB_NAME=database
+      - DB_USERNAME=username
+      - DB_PASSWORD=password
+      ## Azure Blob configurations
+      - AZURE_STORAGE_CONTAINER_NAME=backup-container
+      - AZURE_STORAGE_ACCOUNT_NAME=account-name
+      - AZURE_STORAGE_ACCOUNT_KEY=Ppby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==
+    # pg-bkup container must be connected to the same network with your database
+    networks:
+      - web
+networks:
+  web:
+```
+
+
+