extended tech documentation

Author: Olivier von Dach

src/doc/mkdocs.yml

@@ -10,6 +10,7 @@ nav:
   - API: api/
   - Architecture: architecture.md
   - Testing: testing.md
+  - Miscellaneous: miscellaneous.md
 
 plugins:
   - search

src/doc/tech/miscellaneous.md

@@ -0,0 +1,9 @@
+# Miscellaneous
+
+## Technical documentation
+Build technical documentation with `./gradlew allureAggregateReport plantumlAll generateSwaggerUI mkdocsBuild`.
+
+## AppMap resources
+Generate AppMap resources with `./gradlew appmap test`.
+
+View your local AppMap resources following [this tutorial](https://github.com/vondacho/appmap-viewer#getting-started).