Closer align Makefiles & Dockerfiles (#748)

scripts/linux/build-appimage.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+  
+curl -sSfLO "https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-x86_64.AppImage"
+chmod a+x linuxdeploy*.AppImage
+curl -sSfL https://github.com$(curl https://github.com/probonopd/go-appimage/releases | grep "mkappimage-.*-x86_64.AppImage" | head -n 1 | cut -d '"' -f 2) -o mkappimage.AppImage
+chmod a+x mkappimage.AppImage
+ 
+mkdir -p AppDir/usr/bin
+cp scripts/linux/{soh.desktop,soh.sh} AppDir/
+cp soh/macosx/sohIcon.png AppDir/soh.png
+curl -sSfL https://raw.githubusercontent.com/gabomdq/SDL_GameControllerDB/master/gamecontrollerdb.txt -o AppDir/usr/bin/gamecontrollerdb.txt
+
+mkdir -p AppDir/usr/share/applications 
+mkdir -p AppDir/usr/share/icons/hicolor/scalable/apps
+mkdir -p AppDir/usr/lib
+
+mv AppDir/soh.sh AppDir/usr/bin
+cp -r build/* AppDir/usr/bin
+
+chmod +x AppDir/usr/bin/{soh.elf,OTRGui,soh.sh}
+ 
+cd AppDir && ln -s ./usr/bin/soh.sh ./AppRun && cd ..
+
+export UPD_INFO="gh-releases-zsync|HarbourMasters|Shipwright-linux|develop|SOH-Linux.AppImage.zsync"
+./linuxdeploy-x86_64.AppImage --appimage-extract-and-run  \
+  --appdir=./AppDir/          \
+  -d ./AppDir/soh.desktop     \
+  -i ./AppDir/soh.png         \
+  -e ./AppDir/usr/bin/soh.elf
+
+cd /soh
+ 
+VERSION=Linux ./mkappimage.AppImage --appimage-extract-and-run ./AppDir # "SOH-Linux-x86_64.AppImage"
+mv SOH-Linux-x86_64.AppImage SOH-Linux.AppImage # Keep Original Name