docs: added filestash installation section

src/content/docs/guides/Filestash.md

@@ -0,0 +1,99 @@
+# Filestash:
+
+### Requirements
+All you need is a Linux server with these tools installed:
+
+- docker
+- docker-compose
+- curl
+
+### Self-host using SFTP:
+
+Clone the repository.
+
+```   bash
+git clone https://github.com/mickael-kerjean/filestash.git
+```
+
+Navigate to the Folder.  
+
+``` bash
+cd filestash/docker
+```
+
+Modify the docker-compose file as below:
+
+```  bash
+
+version: '2'
+services:
+  app:
+    container_name: filestash
+    image: machines/filestash
+    restart: always
+    environment:
+    - APPLICATION_URL=
+    - GDRIVE_CLIENT_ID=<gdrive_client>
+    - GDRIVE_CLIENT_SECRET=<gdrive_secret>
+    - DROPBOX_CLIENT_ID=<dropbox_key>
+    - ONLYOFFICE_URL=http://onlyoffice
+    ports:
+    - "8334:8334"
+    volumes:
+    - filestash:/app/data/state/
+
+  onlyoffice:
+    container_name: filestash_oods
+    image: onlyoffice/documentserver
+    restart: always
+    security_opt:
+      - seccomp:unconfined
+  sftp:
+   container_name: sftp-opsfolio
+   image: atmoz/sftp
+   restart: always
+   volumes:
+     - sftp_data:/home
+   command: >
+     <username>:<passwd>:::<folder-name>/
+     observe:pass:::log/
+
+volumes:
+    filestash: {}
+    sftp_data: {}
+```
+
+
+To start the application with Docker Compose, use the following command:
+
+```bash
+$ docker-compose up -d
+```
+
+
+After installation, navigate to `http://your_domain:8334` to configure your admin password:
+
+![Admin page](/images/adminpage.png) 
+
+You can set the administrator password in this section.
+
+Next, choose `SFTP` as your `Storage Backend` . Use the credentials you specified in the docker-compose file to log in as an SFTP user.
+
+![SFTP Admin page](/images/SFTP-login.png) 
+
+
+Enter the hostname, which should match the `sftp` container name, in this example, `sftp-opsfolio` (sftp container name accessed internally) 
+
+Navigate to `advanced` settings and specify port `22`.
+
+![SFTP advanced page](/images/SFTP-advanced.png) 
+
+Once you have clicked `CONNECT`, you will be directed to the default directory set in your docker-compose file.
+
+From here, you can create `NEW FILE` or `NEW FOLDER` by clicking on new file or new folder. To manage permissions, hover over the file or folder, and click the 'share' icon to set the  `Authorization component`.
+
+- Authorization component: Define the permissions for each user once they have logged in. You can assign different access levels such as `viewer, editor, or uploader`. For instance, you may want to grant read/write access to the marketing department, while limiting the sales department to read-only access.
+
+Once you’ve set the appropriate permissions and restrictions, you can copy and share the link with users as needed.
+
+![Authorization component](/images/Authorization-component.png)