Clone the sources with

git clone --recursive http://git.aasimon.org/munia.git

Then prepare the sources with

cd munia
./autogen.sh

Install dependency

sudo apt install libwebsockets-dev

Configure the source tree

./configure --prefix=$PWD/install

this will install the binaries and webservice source files (html, css and js) in a subfolder to the source directory called install.

Now build and install

make -j8 install

After this step muniad is ready to run. See how to run it here.