Add changes to run on alpine

Dockerfile

@@ -1,16 +1,16 @@
-FROM quay.io/fedora/fedora-minimal
+FROM alpine
 WORKDIR /usr/local/app
 
-RUN dnf install -y unzip cmake clang ninja-build libxcb-devel libX11-devel libXcursor-devel libXi-devel libXrandr-devel libjpeg-turbo mesa-libGL-devel fontconfig-devel && dnf clean all
-# Suboptimal libs:
-# - 'GL/glx.h' file not found: mesa-libGL-devel 
+RUN apk --no-cache add cmake clang ninja-build libxcb-dev libx11-dev libxcursor-dev libxi-dev libxrandr-dev libjpeg-turbo libglx-dev
+# Suboptimal libs?
+# - 'GL/glx.h' file not found: mesa-dev
 # - 'fontconfig/fontconfig.h' file not found: fontconfig-dev
 
-RUN curl -o aseprite.zip -L https://github.com/aseprite/aseprite/releases/download/v1.3.16/Aseprite-v1.3.16.1-Source.zip \
+RUN wget -O aseprite.zip https://github.com/aseprite/aseprite/releases/download/v1.3.16/Aseprite-v1.3.16.1-Source.zip \
     && mkdir aseprite \
     && unzip aseprite.zip -d aseprite \
     && rm aseprite.zip
-RUN curl -o Skia-Linux-Release-x64.zip -L https://github.com/aseprite/skia/releases/download/m124-08a5439a6b/Skia-Linux-Release-x64.zip \
+RUN wget -O Skia-Linux-Release-x64.zip https://github.com/aseprite/skia/releases/download/m124-08a5439a6b/Skia-Linux-Release-x64.zip \
     && mkdir skia \    
     && unzip Skia-Linux-Release-x64.zip  -d skia \
     && rm Skia-Linux-Release-x64.zip

src/build.sh

@@ -10,8 +10,10 @@ export CC=clang
 export CXX=clang++
 export SKIA_HOME=/usr/local/app/skia
 export NINJA_PATH=/usr/lib/ninja-build/bin/ninja
+export CMAKE_MAKE_PROGRAM=/usr/lib/ninja-build/bin/ninja
 export CMAKE_PREFIX_PATH=/usr/include;
 cmake \
+  -DCMAKE_MAKE_PROGRAM=/usr/lib/ninja-build/bin/ninja \
   -DCMAKE_BUILD_TYPE=RelWithDebInfo \
   -DCMAKE_CXX_FLAGS:STRING=-stdlib=libstdc++ \
   -DCMAKE_EXE_LINKER_FLAGS:STRING=-stdlib=libstdc++ \
@@ -21,4 +23,4 @@ cmake \
   -DSKIA_LIBRARY=$SKIA_HOME/out/Release-x64/libskia.a \
   -G Ninja \
   ..
-ninja aseprite
+$NINJA_PATH aseprite