docs: add Windows setup instructions and update Postman docs (#486)

docs/try_local_system.md

@@ -20,6 +20,7 @@ Check the Table Of Contents to jump to the relevant section.
 - [Set up hyperswitch using Docker Compose](#set-up-hyperswitch-using-docker-compose)
 - [Set up a Rust environment and other dependencies](#set-up-a-rust-environment-and-other-dependencies)
   - [Set up dependencies on Ubuntu-based systems](#set-up-dependencies-on-ubuntu-based-systems)
+  - [Set up dependencies on Windows](#set-up-dependencies-on-windows)
   - [Set up dependencies on MacOS](#set-up-dependencies-on-macos)
   - [Set up the database](#set-up-the-database)
   - [Configure the application](#configure-the-application)
@@ -131,12 +132,51 @@ for your distribution and follow along.
    cargo install diesel_cli --no-default-features --features "postgres"
    ```
 
+5. Make sure your system has OpenSSL installed:
+
+   ```shell
+   sudo apt install libssl-dev
+   ```
+
 Once you're done with setting up the dependencies, proceed with
 [setting up the database](#set-up-the-database).
 
 [postgresql-install]: https://www.postgresql.org/download/
 [redis-install]: https://redis.io/docs/getting-started/installation/
 
+### Set up dependencies on Windows
+
+We'll be using [`winget`][winget] in this section of the guide, where possible.
+You can opt to use your favorite package manager instead.
+
+1. Install PostgreSQL database, following the
+   [official installation docs][postgresql-install-windows].
+
+2. Install Redis, following the
+   [official installation docs][redis-install-windows].
+
+3. Install rust with `winget`:
+
+   ```shell
+   winget install -e --id Rustlang.Rust.GNU
+   ```
+
+4. Install `diesel_cli` using `cargo`:
+
+   ```shell
+   cargo install diesel_cli --no-default-features --features "postgres"
+   ```
+
+5. Install OpenSSL with `winget`:
+
+   ```shell
+   winget install openssl
+   ```
+
+[winget]: https://github.com/microsoft/winget-cli
+[postgresql-install-windows]: https://www.postgresql.org/download/windows/
+[redis-install-windows]: https://redis.io/docs/getting-started/installation/install-redis-on-windows
+
 ### Set up dependencies on MacOS
 
 We'll be using [Homebrew][homebrew] in this section of the guide.
@@ -306,8 +346,13 @@ Once you're done with configuring the application, proceed with
 1. Sign up or sign in to [Postman][postman].
 2. Open our [Postman collection][postman-collection] and switch to the
    ["Variables" tab][variables].
-   Add the admin API key you configured in the application configuration under
-   the "current value" column for the `admin_api_key` variable.
+   Update the value under the "current value" column for the `baseUrl` variable
+   to have the hostname and port of the locally running server
+   (`http://localhost:8080` by default).
+
+3. While on the "Variables" tab, add the admin API key you configured in the
+   application configuration under the "current value" column for the
+   `admin_api_key` variable.
 
    1. If you're running Docker Compose, you can find the configuration file at
       [`config/docker_compose.toml`][config-docker-compose], search for
@@ -316,8 +361,8 @@ Once you're done with configuring the application, proceed with
       file at [`config/Development.toml`][config-development], search for
       `admin_api_key` to find the admin API key
 
-3. Open the ["Quick Start" folder][quick-start] in the collection.
-4. Open the ["Merchant Account - Create"][merchant-account-create] request,
+4. Open the ["Quick Start" folder][quick-start] in the collection.
+5. Open the ["Merchant Account - Create"][merchant-account-create] request,
    switch to the "Body" tab and update any request parameters as required.
 
    - If you want to use a different connector for making payments with
@@ -330,7 +375,7 @@ Once you're done with configuring the application, proceed with
    Store the merchant ID, API key and publishable key returned in the response
    securely.
 
-5. Open the ["Variables" tab][variables] in the
+6. Open the ["Variables" tab][variables] in the
    [Postman collection][postman-collection] and add the following variables:
 
    1. Add the API key you obtained in the previous step under the "current value"
@@ -349,6 +394,9 @@ Once you're done with configuring the application, proceed with
      `connector_account_details` fields and update them.
      You can find connector-specific details to be included in this
      [spreadsheet][connector-specific-details].
+   - Open the ["Variables" tab][variables] in the
+     [Postman collection][postman-collection] and set the `connector_api_key`
+     variable to your connector's API key.
 
    Click on the "Send" button to create a payment connector account.
    You should obtain a response containing most of the data included in the