Update Makefile to use Docker for pandoc commands

Author: crotsos

Makefile

@@ -1,17 +1,23 @@
 all: output/lab-handout.html output/lab-material.zip output/MN.html
 
+topo: topology.py
+	mn --custom topology.py --topo LabTopology --controller none --mac --arp --switch lxbr --link tc
+
+clean:
+	mn -c
+
 output/lab-handout.html: .resources/metadata.md README.md .resources/pandoc.css
 	mkdir -p output
-	cat .resources/metadata.md README.md | pandoc -s -f markdown+task_lists -t html5 --css .resources/pandoc.css --lua-filter=.resources/enable-checkbox.lua --embed-resources -o output/lab-handout.html
+	docker run -ti --rm -v "`pwd`":/workspace/ scc-registry.lancs.ac.uk/teaching/pandoc_base:latest sh -c "cd /workspace; cat .resources/metadata.md README.md | pandoc -s -f markdown+task_lists -t html5 --css .resources/pandoc.css --lua-filter=.resources/enable-checkbox.lua --embed-resources -o output/lab-handout.html"
 
 output/MN.html: .resources/metadata.md MN.md .resources/pandoc.css
 	mkdir -p output
-	cat .resources/metadata.md MN.md | pandoc -s -f markdown+task_lists -t html5 --css .resources/pandoc.css --lua-filter=.resources/enable-checkbox.lua --embed-resources -o output/MN.html	
+	docker run -ti --rm -v "`pwd`":/workspace/ scc-registry.lancs.ac.uk/teaching/pandoc_base:latest sh -c "cd /workspace; cat .resources/metadata.md MN.md | pandoc -s -f markdown+task_lists -t html5 --css .resources/pandoc.css --lua-filter=.resources/enable-checkbox.lua --embed-resources -o output/MN.html"	
 
 output/lab-material.zip: topology.py server.py solution/Makefile .devcontainer.json
 	mkdir -p output
 	zip -j output/lab-material.zip topology.py server.py solution/Makefile .devcontainer.json
 
 clean:
 	rm -f output/*.html
-	rmdir -p output 2>/dev/null || true
+	rmdir -p output 2>/dev/null || true