feat: add all three docker command

Author: prafull-opensignlabs

README.md

@@ -80,9 +80,19 @@ Welcome to OpenSign, the premier open source docusign alternative - document e-s
 
 #### Docker
 The simplest way to install OpenSign on your own server is using official docker images by running the following command -
+
+**Command for linux/MacOS**
 ``` 
 export HOST_URL=https://opensign.yourdomain.com && curl --remote-name-all https://raw.githubusercontent.com/OpenSignLabs/OpenSign/main/docker-compose.yml https://raw.githubusercontent.com/OpenSignLabs/OpenSign/main/Caddyfile https://raw.githubusercontent.com/OpenSignLabs/OpenSign/main/.env.local_dev && mv .env.local_dev .env.prod && docker compose up --force-recreate
 ```
+**Command for Windows (Powershell)**
+```
+$env:HOST_URL="https://opensign.yourdomain.com"; Invoke-WebRequest -Uri https://raw.githubusercontent.com/OpenSignLabs/OpenSign/main/docker-compose.yml -OutFile docker-compose.yml; Invoke-WebRequest -Uri https://raw.githubusercontent.com/OpenSignLabs/OpenSign/main/Caddyfile -OutFile Caddyfile; Invoke-WebRequest -Uri https://raw.githubusercontent.com/OpenSignLabs/OpenSign/main/.env.local_dev -OutFile .env.local_dev; Rename-Item -Path .env.local_dev -NewName .env.prod; docker compose up --force-recreate
+```
+**Command for Windows (CMD/Terminal)**
+```
+set HOST_URL=https://opensign.yourdomain.com && curl -O https://raw.githubusercontent.com/OpenSignLabs/OpenSign/main/docker-compose.yml && curl -O https://raw.githubusercontent.com/OpenSignLabs/OpenSign/main/Caddyfile && curl -O https://raw.githubusercontent.com/OpenSignLabs/OpenSign/main/.env.local_dev && rename .env.local_dev .env.prod && docker compose up --force-recreate
+```
 Make sure that you have `Docker` and `git` installed before you run this command -
 
 Please refer to the [Installation Guide](https://docs.opensignlabs.com/docs/self-host/docker/run-locally/) for detailed instructions on how to install OpenSign on your system.