removing .gitignore

docs/helios64/install.md

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+!!! note
+    Go to [Kit Assembly](/helios64/kit) to find out how to put together your Helios64 NAS
+
+## **Install Method**
+There is several ways to install OS to your Helios64 board:
+
+**1. [Install to micro-SD Card](/helios64/install-1)<br>**
+**2. [Install to the eMMC module via micro-SD Card](/helios64/install-2)<br>**
+**3. [Install to eMMC module directly via USB-C cable](/helios64/install-3)<br>**
+**4. [Install on USB drive](/helios64/install-4)<br>**
+**5. [Install on M.2 NVMe drive](/helios64/install-5)<br>**
+
+Different choice of storage resulting in different IO read/write speed, this may affect the performance of installed OS.
+
+## **What you need before you start.**
+
+**1. microSD Card<br>**
+You need a microSD Card UHS-I with a minimum of 8GB. We recommend the following models:
+
+- SanDisk Extreme microSDHC UHS-I Card (32GB)
+- SanDisk Extreme PRO microSDHC UHS-I Card (32GB)
+- Strontium Nitro MicroSD Card (16GB)
+- Samsung microSDHC UHS-I Card EVO Plus (32GB)
+
+![Recommended SDcard](/helios64/img/install/recommended_sdcard.jpg)
+
+You might refer to the [SD Card](/helios64/sdcard/#tested-microsd-card) page to find a compatibility list of SD Card models.
+
+**2. USB-C cable<br>**
+![USB-C cable](/helios64/img/install/usb-c.jpg)
+
+
+**3. Ethernet cable (cat5/6)<br>**
+![Network cable](/helios64/img/install/network_cable.jpg)
+