esp8266_deauther/web_server/readme.md

1 Use a minifier (e.g. htmlcompressor.com) to get your files as small as possible
2 Open converter.html
3 Paste the code in the left textfield
4 Press Convert
5 Copy the results from the right textfield
6 Go to data.h and replace the array of the changed file with the copied bytes

Now compile and upload your new sketch :)