Add CI actions for bootstrap builds

Signed-off-by: falkTX <falktx@falktx.com>

.github/workflows/bootstrap-minimal.yml

@@ -0,0 +1,29 @@
+name: bootstrap-minimal
+
+on: [push, pull_request]
+
+jobs:
+  ubuntu_20_04:
+    strategy:
+      matrix:
+        platform: [modduo, modduo-static, modduo-new, modduox, modduox-static, modduox-new, moddwarf, moddwarf-new]
+    runs-on: ubuntu-latest
+    container:
+      image: ubuntu:20.04
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/mod-workdir/download
+          key: download-ubuntu_20_04-${{ matrix.platform }}
+      - name: Install dependencies
+        run: |
+          apt-get install \
+            acl bc curl cvs git mercurial rsync subversion wget \
+            bison bzip2 flex gawk gperf gzip help2man nano perl patch tar texinfo unzip \
+            automake binutils build-essential cpio libtool libncurses-dev pkg-config python-is-python3 libtool-bin
+      - name: Bootstrap
+        run: |
+          ./bootstrap.sh ${{ matrix.platform }} minimal