Docs: add dependency installation commands for RHEL based systems

docs/source/technical_design/localinstall.rst

@@ -24,9 +24,9 @@ Before installing
 Install Docker
 **************
 
-OpenKAT is installed in Docker, and therefore Docker must be installed first. The preferred method of installation is through a repository.
+OpenKAT is installed in Docker, and therefore Docker must be installed first. The preferred method of installation is through a repository. However, OpenKAT requires a newer version of Docker than what is available in the default ubuntu and debian repositories. That is why you should always use Docker's repository. 
 
-OpenKAT requires a newer version of Docker than what is available in the default ubuntu and debian repositories. That is why you should always use Docker's repository. On the `Docker Engine installation overview <https://docs.docker.com/engine/install/>`_ page you can find links to installation pages for all major Linux distributions. For a specific example using the Docker repository on Debian, see `Debian install using the repository <https://docs.docker.com/engine/install/debian/#install-using-the-repository>`_. The installation pages for the other Linux distributions contain similar instructions.
+On the `Docker Engine installation overview <https://docs.docker.com/engine/install/>`_ page you can find links to installation pages for all major Linux distributions. For a specific example using the Docker repository on Debian, see `Debian install using the repository <https://docs.docker.com/engine/install/debian/#install-using-the-repository>`_. The installation pages for the other Linux distributions contain similar instructions.
 
 **Important:** Please follow the post-installation steps as well! You can find them here: `Docker Engine post-installation steps <https://docs.docker.com/engine/install/linux-postinstall/>`_.
 
@@ -35,15 +35,34 @@ Install dependencies
 
 Dependencies are packages required for OpenKAT to work. Run the following commands to install them:
 
+*Debian based systems:*
+
 
 .. code-block:: sh
 
 	$ curl -fsSL https://deb.nodesource.com/setup_16.x | sudo -E bash -
-	$ sudo apt-get install -y nodejs gcc g++ make python3-pip docker-compose
+	$ sudo apt-get install -y nodejs gcc g++ make python3-pip
 	$ curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --dearmor | sudo tee /usr/share/keyrings/yarnkey.gpg >/dev/null
 	$ echo "deb [signed-by=/usr/share/keyrings/yarnkey.gpg] https://dl.yarnpkg.com/debian stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
 	$ sudo apt-get update && sudo apt-get install yarn
 
+After installing Docker from the Docker repository it might be necessary to create a symlink for the command `docker-compose` as the latest version now uses a space instead of a dash. You can do this with the following command: 
+
+.. code-block:: sh
+
+	$ ln -s /usr/libexec/docker/cli/plugins/compose /usr/bin/docker-compose
+
+*RHEL based systems:*
+
+.. code-block:: sh
+
+    $ sudo dnf install openssl -y
+    $ sudo dnf install https://rpm.nodesource.com/pub_18.x/nodistro/repo/nodesource-release-nodistro-1.noarch.rpm -y
+    $ sudo dnf install nodejs -y --setopt=nodesource-nodejs.module_hotfixes=1
+    $ sudo dnf install -y nodejs gcc g++ make python3-pip docker-compose
+    $ curl --silent --location https://dl.yarnpkg.com/rpm/yarn.repo | sudo tee /etc/yum.repos.d/yarn.repo
+    $ sudo dnf install yarn -y
+
 Getting Started
 ---------------
 
@@ -68,6 +87,7 @@ Default installation
 
 .. code-block:: sh
 
+	$ make env
 	$ make kat
 
 Currently, the ``make kat`` command only works for the first user on a ``*nix`` system. This is a known problem which will be solved soon. The current user must be user 1000. You can check this by executing `id`.
@@ -126,4 +146,4 @@ OpenTelemetry
 
 OpenTelemetry is a way to trace requests through the system. It is used to find out where a request is going wrong and to instrument performance problems. OpenTelemetry is not enabled by default, but can be enabled by uncommenting the environment variable ``SPAN_EXPORT_GRPC_ENDPOINT`` in the ``.env`` file.
 
-The `Jaeger <https://www.jaegertracing.io>`_ tracing system is used to view the traces. It can be enabled by enabling the `Docker Compose profile <https://docs.docker.com/compose/profiles/#enable-profiles>`, for example by running ``docker-compose --profile jaeger up -d`` or using ``export COMPOSE_PROFILES=jaeger`` and then running Make as usual. The Jaeger UI can then be found at http://localhost:16686.
+The `Jaeger <https://www.jaegertracing.io>`_ tracing system is used to view the traces. It can be enabled by enabling the `Docker Compose profile <https://docs.docker.com/compose/profiles/#enable-profiles>`_, for example by running ``docker-compose --profile jaeger up -d`` or using ``export COMPOSE_PROFILES=jaeger`` and then running Make as usual. The Jaeger UI can then be found at http://localhost:16686.