doc: add CoC information to documentation

doc/doxygen/.gitignore

@@ -1,2 +1,3 @@
 src/css/variables.less
 src/changelog.md
+src/coc.md

doc/doxygen/Makefile

@@ -16,17 +16,17 @@ doc: $(DOCUMENTATION_FORMAT)
 
 # by marking html as phony we force make to re-run Doxygen even if the directory exists.
 .PHONY: html
-html: src/changelog.md
+html: src/changelog.md src/coc.md
 	( cat riot.doxyfile ; echo "GENERATE_HTML = yes" ) | doxygen -
 	@echo ""
 	@echo "RIOT documentation successfully generated at file://$(RIOTBASE)/doc/doxygen/html/index.html"
 
 .PHONY: check
-check: src/changelog.md
+check: src/changelog.md src/coc.md
 	( cat riot.doxyfile) | doxygen -
 
 .PHONY: man
-man: src/changelog.md
+man: src/changelog.md src/coc.md
 	( cat riot.doxyfile ; echo "GENERATE_MAN = yes" ) | doxygen -
 
 src/css/riot.css: src/css/riot.less src/css/variables.less
@@ -39,6 +39,9 @@ src/css/variables.less: src/config.json
 src/changelog.md: src/changelog.md.tmp ../../release-notes.txt
 	@./generate-changelog.py $+ $@
 
+src/coc.md: ../../CODE_OF_CONDUCT.md
+	awk 'NR == 1 {print $$0,"{#coc}"} NR > 1 {print $$0}' $< > $@
+
 .PHONY:
 latex: src/changelog.md
 	( cat riot.doxyfile ; echo "GENERATE_LATEX= yes" ) | doxygen -

doc/doxygen/riot.doxyfile

@@ -868,6 +868,10 @@ INPUT                  = ../../doc.txt \
                          src/vision.md \
                          src/community-processes.md \
                          src/roadmap.md \
+                         src/coc-info.md \
+                         src/coc.md \
+                         src/coc-reporting-guide.md \
+                         src/coc-faq.md \
                          src/creating-modules.md \
                          src/creating-an-application.md \
                          src/porting-boards.md \

doc/doxygen/src/coc-info.md

@@ -0,0 +1,8 @@
+Code of Conduct Information    {#coc-info}
+===========================
+
+The following documents are describing all matters around our code of conduct:
+
+- The \subpage coc itself,
+- The \subpage coc-reporting-guide, and
+- The \subpage coc-faq