docs: add Teiler and Exporter to the main README.md (#315)

Co-authored-by: Tobias Kussel <TKussel@users.noreply.github.com>

README.md

@@ -24,6 +24,9 @@ This repository is the starting point for any information and tools you will nee
     - [BBMRI-ERIC Directory entry needed](#bbmri-eric-directory-entry-needed)
     - [Directory sync tool](#directory-sync-tool)
     - [Loading data](#loading-data)
+    - [Teiler (Frontend)](#teiler-frontend)
+    - [Data Exporter Service](#data-exporter-service)
+      - [Data Quality Report](#data-quality-report)
 4. [Things you should know](#things-you-should-know)
     - [Auto-Updates](#auto-updates)
     - [Auto-Backups](#auto-backups)
@@ -379,6 +382,36 @@ Normally, you will need to build your own ETL to feed the Bridgehead. However, t
 
 You can find the profiles for generating FHIR in [Simplifier](https://simplifier.net/bbmri.de/~resources?category=Profile).
 
+### Teiler (Frontend)
+
+Teiler is the web-based frontend of the Bridgehead, providing access to its various internal, and external services and components.   
+To learn how to integrate your custom module into Teiler, please refer to https://github.com/samply/teiler-dashboard.
+- To activate Teiler, set the following environment variable in your `<PROJECT>.conf` file:  
+
+```bash
+ENABLE_TEILER=true
+```
+
+### Data Exporter Service
+
+The Exporter is a dedicated service for extracting and exporting Bridgehead data in (tabular) formats such as Excel, CSV, Opal, JSON, XML, ...  
+- To enable the Exporter service, set the following environment variable in your `<PROJECT>.conf` file:  
+
+```bash
+ENABLE_EXPORTER=true
+
+#### Data Quality Report
+To assess the quality and plausibility of your imported data, the Reporter component is pre-configured to generate Excel reports with data quality metrics and statistical analyses. Reporter is part of the Exporter and can be enabled by setting the same environment variable in your `<PROJECT>.conf` file:
+```bash
+ENABLE_EXPORTER=true
+```
+
+For convenience, it's recommended to enable the Teiler web frontend alongside the Exporter to access export and quality control features via a web interface: set the following environment varibles in your `<PROJECT>.conf` file:
+```bash
+ENABLE_TEILER=true
+ENABLE_EXPORTER=true
+```
+
 ## Things you should know
 
 ### Auto-Updates