Add documentation for building custom Presidio Docker images

docs/building_custom_docker_images.md

@@ -0,0 +1,104 @@
+supported\_languages:
+
+  - en
+
+  - de
+
+
+
+\# Building Custom Presidio Docker Images
+
+
+
+\## Overview
+
+
+
+This guide explains how to build custom Presidio Docker images with support for additional languages beyond English.
+
+
+
+\*Common Use Cases:\*
+
+\- Add German, Spanish, French language support
+
+\- Use different NLP backends (Spacy vs Stanza)
+
+\- Optimize for production deployments
+
+
+
+\---
+
+
+
+\## Key Files to Modify
+
+
+
+When customizing Presidio, you'll work with configuration files in:
+
+presidio-analyzer/presidio\_analyzer/conf
+
+\### Important Configuration Files
+
+
+
+1\. \*default\_recognizers.yaml\*
+
+   - Defines which PII recognizers are enabled/disabled
+
+   - Specifies language support for each recognizer
+
+   - Location: presidio-analyzer/presidio\_analyzer/conf/default\_recognizers.yaml
+
+
+
+2\. \*spacy.yaml / stanza.yaml\*
+
+   - Configure which NLP backend to use
+
+   - Location: presidio-analyzer/presidio\_analyzer/conf/
+
+
+
+\### Example: Add German Language Support
+
+
+
+1\. Open presidio-analyzer/presidio\_analyzer/conf/default\_recognizers.yaml
+
+
+
+2\. Find the "Germany recognizers" section (around line 312)
+
+
+
+3\. Change enabled: false to enabled: true:
+
+
+
+```yaml
+
+\- name: DeTaxIdRecognizer
+
+  supported\_languages:
+
+  - de
+
+  type: predefined
+
+  enabled: true
+
+
+
+\- name: DePassportRecognizer
+
+  supported\_languages:
+
+  - de
+
+  type: predefined
+
+  enabled: true
+