Add code to create a simple TOC

Add a little code to create a simple table of contents (TOC).
I'll probably do something more sophisticated later
(e.g., link to each section and add level 4 with HTML details)
but this makes it easy to see the basic TOC.

Signed-off-by: David A. Wheeler <[email protected]>

Author: david-a-wheeler

makefile

@@ -1,7 +1,11 @@
 # Used for local processing
 
-all: lint
+all: lint toc.md
 
 lint:
 	markdownlint --config .github/linters/.markdown-lint.yml \
 	  secure_software_development_fundamentals.md 
+
+toc.md: lint secure_software_development_fundamentals.md tocignore
+	grep -E '^#{1,3} ' secure_software_development_fundamentals.md | \
+	  grep -E -v -f tocignore | sed 's/^# Part /Part /' > toc.md

tocignore

@@ -0,0 +1,5 @@
+\#+ Secure Software Development Fundamentals
+\#+ Table of contents
+\#+ Quiz .*
+\#+ .* Final Exam
+\#+ Education Team Requirements