GitHub Actions steps.

.github/workflows/build.yml

@@ -0,0 +1,33 @@
+name: Build
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Update APT
+      run: sudo apt-get update
+    - name: Install Dependencies
+      run: |
+        sudo apt-get install -y build-essential git make autoconf automake libtool \
+        pkg-config cmake ninja-build gnome-desktop-testing libasound2-dev libpulse-dev \
+        libaudio-dev libjack-dev libsndio-dev libsamplerate0-dev libx11-dev libxext-dev \
+        libxrandr-dev libxcursor-dev libxfixes-dev libxi-dev libxss-dev libwayland-dev \
+        libxkbcommon-dev libdrm-dev libgbm-dev libgl1-mesa-dev libgles2-mesa-dev \
+        libegl1-mesa-dev libdbus-1-dev libibus-1.0-dev libudev-dev fcitx-libs-dev
+    - name: Pull Dependencies
+      run: make getdeps -j
+    - name: Build
+      run: make
+    - name: Artifact AppImage
+      uses: actions/upload-artifact@v3
+      with:
+        name: AppImage
+        path: love-main.AppImage
+    - name: Artifact Tape Archive
+      uses: actions/upload-artifact@v3
+      with:
+        name: tar.gz
+        path: love-main.tar.gz