bwits/html2txt
suppose the html file test.html
is at your current folder
$ docker pull bwits/html2txt
$ alias html2txt="docker run -ti --rm -v $(pwd):/app bwits/html2txt"
$ html2txt /app/test.html /app/test.txt
$ cat test.txt
Now you should have the test.txt file generated in current folder
https://github.com/BWITS/Docker-builder/tree/master/html2txt/Alpine
docker pull bwits/html2txt