Add CI workflow

.github/workflows/build.yml

@@ -0,0 +1,52 @@
+name: Build
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    container: ghcr.io/doldecomp/ttyd-build:main
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        version: [G8MJ01]
+
+    steps:
+    # Checkout the repository
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    # Set Git config
+    - name: Git config
+      run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
+
+    # Copy the original files to the workspace
+    - name: Prepare
+      run: cp -R /orig .
+
+    # Build the project
+    - name: Build
+      run: |
+        python configure.py --map --version ${{ matrix.version }} \
+            --binutils /binutils --compilers /compilers
+        ninja all_source build/${{ matrix.version }}/progress.json \
+            build/${{ matrix.version }}/report.json
+
+    # Upload map files
+    - name: Upload map
+      uses: actions/upload-artifact@v4
+      with:
+        name: ${{ matrix.version }}_maps
+        path: build/${{ matrix.version }}/**/*.MAP
+
+    # Upload progress report
+    - name: Upload report
+      uses: actions/upload-artifact@v4
+      with:
+        name: ${{ matrix.version }}_report
+        path: build/${{ matrix.version }}/report.json