add workflow

Author: Flemmbrav

.github/workflows/build_nightly.yml

@@ -0,0 +1,50 @@
+name: Nightly build Ubuntu
+
+on: [push]
+
+jobs:
+  compile_pak192-comic:
+
+    runs-on: ubuntu-latest
+   
+    steps:
+    - uses: actions/checkout@v1
+
+    - name: install_dependencies
+      run: |
+        sudo apt-get -y update
+        sudo apt-get -ym install libpng-dev
+        sudo apt-get -ym install libsdl2-dev
+        sudo apt-get -ym install libbz2-dev
+        sudo apt-get -ym install autoconf
+        svn checkout svn://servers.simutrans.org/simutrans simutrans
+    - name: setup
+      run: |
+        cd simutrans/trunk
+        autoconf
+        ./configure
+        cat config.default >>/dev/stderr
+    - name: make makeobj
+      run: |
+          cd simutrans/trunk/makeobj
+          make
+          mv makeobj ../../..
+          cd ../../..
+          rm -rf simutrans
+
+    - name: make pak192
+      run: |
+        bash COMPILE.sh
+    - name: Rename result
+      run: |
+        mv compiled pak192.comic-nightly
+        zip -r pak192-nightly.zip pak192.comic-nightly
+
+    - name: Update binaries of Nightly Release
+      uses: svenstaro/upload-release-action@v1-release
+      with:
+        repo_token: ${{ secrets.GITHUB_TOKEN }}
+        file: ./pak192-nightly.zip
+        asset_name: pak192-nightly.zip
+        tag: Nightly
+        overwrite: true