Added MQTT Dashboard

examples/mqtt-dashboard/client/Makefile

@@ -0,0 +1,15 @@
+PWD := $(shell pwd)
+
+all: bundle.js main.css
+	make -C ../../http-server ARGS="-d $(PWD)"
+
+# Bundle JS libraries (preact, preact-router, ...) into a single file
+bundle.js:
+	curl -s https://npm.reversehttp.com/preact,preact/hooks,htm/preact,preact-router -o $@
+
+# Create optimised CSS. Prerequisite: npm -g i tailwindcss tailwindcss-font-inter
+main.css: index.html $(wildcard *.js)
+	npx tailwindcss -o $@ --minify
+
+clean:
+	true