Create guide_streamlit.rst (#1847)

* Create guide_streamlit.rst

* dropped non-root dir as requested

* Update guide_streamlit.rst

* [Streamlit] rewrite according to our template, fix links and layout

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Co-authored-by: Moritz <[email protected]>

source/guide_streamlit.rst

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+.. highlight:: console
+
+.. author:: Torben <https://entorb.net/contact.php?origin=UberspaceLab>
+
+.. tag:: lang-python
+.. tag:: streamlit
+.. tag:: web
+.. tag:: audience-developers
+
+#########
+Streamlit
+#########
+
+.. tag_list::
+
+Streamlit_ is a high-level Python Web framework focussing on data visualization.
+
+----
+
+.. note:: For this guide, you should be familiar with the basic concepts of
+
+  * :manual:`Python <lang-python>` and its package manager pip
+  * :manual:`Supervisord <daemons-supervisord>` to set up your service
+
+License
+=======
+
+All relevant legal information can be found in the `terms of use`_.
+
+Prerequisites
+=============
+
+Your URL needs to be setup:
+
+.. include:: includes/web-domain-list.rst
+
+For this guide we will use *mysiteproject* as the project's name and will install it to ``~/mysiteproject``.
+
+Installation
+============
+
+Install the latest Streamlit version.
+
+.. code-block:: console
+
+  [isabell@stardust ~]$ pip3.11 install --user streamlit
+  [isabell@stardust ~]$
+
+Create Project
+--------------
+
+Create a directory for your project. We use `~/mysiteproject` for this guide.
+
+.. code-block:: console
+
+  [isabell@stardust ~]$ mkdir ~/mysiteproject
+  [isabell@stardust ~]$ mkdir ~/mysiteproject/.streamlit
+  [isabell@stardust ~]$
+
+.. warning:: While it does not matter how you name it and where you put it, we suggest that you do **not** put this directory under any path served to the web (e.g. ``~/html``), to avoid exposing your files.
+
+Configuration
+=============
+
+Create ``~/mysiteproject/.streamlit/config.toml``
+
+.. code-block:: 
+
+  [browser]
+  gatherUsageStats = false
+
+  [server]
+  headless = true
+  port = 8501
+  baseUrlPath = ""
+
+See Streamlit `configuration documentation`_ for more information.
+
+Example App
+===========
+
+Create ``~/mysiteproject/app.py``
+
+.. code-block:: python
+
+  import streamlit as st
+  st.title("Test")
+
+Add Web Backend
+===============
+
+.. note:: Streamlit is running on port 8501.
+
+.. include:: includes/web-backend.rst
+
+Setup Service
+=============
+
+Create ``~/etc/services.d/mysiteproject.ini`` with the following content:
+
+.. code-block:: ini
+  :emphasize-lines: 2,3
+
+  [program:mysiteproject]
+  directory=%(ENV_HOME)s/mysiteproject
+  command=streamlit run app.py
+
+After creating the configuration, tell :manual:`supervisord <daemons-supervisord>` to refresh its configuration and start the service.
+
+.. include:: includes/supervisord.rst
+
+Configure Web Backend
+---------------------
+
+.. note:: Streamlit is running on port 8501.
+
+.. include:: includes/web-backend.rst
+
+Your backend should now point to the service.
+
+.. _Streamlit: https://docs.streamlit.io/
+.. _terms of use: https://streamlit.io/terms-of-use
+.. _configuration documentation: https://docs.streamlit.io/develop/api-reference/configuration/config.toml
+
+----
+
+Tested with Streamlit 1.40.2, Python 3.11, Uberspace 7.16
+
+.. author_list::