Add doxygen

Author: vimpostor

.github/workflows/ci.yml

@@ -14,3 +14,5 @@ jobs:
       run: docker build --build-arg cxx=$CXX -t blobdrop .
     - name: Format code
       run: docker run fftune sh -c 'scripts/format-code.sh'
+    - name: Build documentation
+      run: docker run fftune sh -c 'cd doc && doxygen'

Dockerfile

@@ -6,5 +6,5 @@ ENV CXX=$cxx
 
 ADD . /build
 WORKDIR /build
-RUN pacman -Syu --noconfirm doxygen imagemagick
+RUN pacman -Syu --noconfirm imagemagick
 RUN scripts/build.sh