Inform about unicode locale

README.md

@@ -4,17 +4,22 @@ Welcome to the Pwn2Win CTF **Platform Test Edition**.
 
 ## Registration
 
-1. All team members must have a GitHub account and [configure a SSH key in their account settings](https://github.com/settings/keys).
+1. Please make sure you are using an Unicode locale, e.g.
+   ```bash
+   export LC_ALL=en_US.UTF-8
+   ```
+
+2. All team members must have a GitHub account and [configure a SSH key in their account settings](https://github.com/settings/keys).
 
    **Note**: If you prefer team members to stay anonymous, you can create a single GitHub account for the entire team and share its credentials.
 
-2. All team members must have the git client [correctly set up](https://git-scm.com/book/en/v2/Getting-Started-First-Time-Git-Setup). If you have never used git before, run:
+3. All team members must have the git client [correctly set up](https://git-scm.com/book/en/v2/Getting-Started-First-Time-Git-Setup). If you have never used git before, run:
    ```bash
    git config --global user.name "John Doe"
    git config --global user.email [email protected]
    ```
 
-2. All team members must clone the repository and install the dependencies:
+4. All team members must clone the repository and install the dependencies:
    ```bash
    git clone [email protected]:pwn2winctf/PTE.git
    cd PTE
@@ -23,22 +28,22 @@ Welcome to the Pwn2Win CTF **Platform Test Edition**.
    ```
    **Note**: If you are using Ubuntu 14.04, add [ppa:elt/libsodium](https://launchpad.net/~elt/+archive/ubuntu/libsodium) to your system to be able to install `libsodium18`. If you are using Debian, you need to get the package from [sid](https://packages.debian.org/sid/libsodium18).
 
-3. If dependencies are installed correctly, you should now see the help menu when calling:
+5. If dependencies are installed correctly, you should now see the help menu when calling:
    ```bash
    ./ctf -h
    ```
 
-4. The **leader of the team** must execute the following command and follow the instructions to register the team:
+6. The **leader of the team** must execute the following command and follow the instructions to register the team:
    ```bash
    ./ctf init
    ```
 
-5. The **other members of the team** must login to GitHub without registering a new team, by running:
+7. The **other members of the team** must login to GitHub without registering a new team, by running:
    ```bash
    ./ctf login
    ```
 
-6. After that, **the leader** must share the `team-secrets.json` with the members of the team. The **other members of the team** must place the `team-secrets.json` file shared by the leader in their `PTE` directory.
+8. After that, **the leader** must share the `team-secrets.json` with the members of the team. The **other members of the team** must place the `team-secrets.json` file shared by the leader in their `PTE` directory.
 
 ## Challenges