ci: Set up CI for devcontainer

.github/workflows/ci.yml

@@ -8,8 +8,25 @@ on:
     branches: [main]
 
 jobs:
+  build_devcontainer:
+    name: Build (Devcontainer)
+    run-on: ubuntu-latest
+    env:
+      TAG: cpython-devcontainer:1.0.0-${{ github.run_id }}
+    steps:
+      - name: Checkout Push to Registry action
+        uses: actions/checkout@v4
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Build Dockerfile
+        uses: docker/build-push-action@v5
+        with:
+          context: ./devcontainer
+          load: true
+          tags: ${{ env.TAG }}
+
   build_autoconf:
-    name: Build and test
+    name: Build and test (Autoconf)
     strategy:
       fail-fast: false
       matrix:

devcontainer/Dockerfile

@@ -0,0 +1,26 @@
+FROM docker.io/library/fedora:40
+
+ENV CC=clang
+
+ENV WASI_SDK_VERSION=24
+ENV WASI_SDK_PATH=/opt/wasi-sdk
+
+ENV WASMTIME_HOME=/opt/wasmtime
+ENV WASMTIME_VERSION=22.0.0
+ENV WASMTIME_CPU_ARCH=x86_64
+
+RUN dnf -y --nodocs --setopt=install_weak_deps=False install /usr/bin/{blurb,clang,curl,git,ln,tar,xz} 'dnf-command(builddep)' && \
+    dnf -y --nodocs --setopt=install_weak_deps=False builddep python3 && \
+    dnf -y clean all
+
+RUN mkdir ${WASI_SDK_PATH} && \
+    curl --location https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-${WASI_SDK_VERSION}/wasi-sdk-${WASI_SDK_VERSION}.0-x86_64-linux.tar.gz | \
+    tar --strip-components 1 --directory ${WASI_SDK_PATH} --extract --gunzip
+
+RUN mkdir --parents ${WASMTIME_HOME} && \
+    curl --location "https://github.com/bytecodealliance/wasmtime/releases/download/v${WASMTIME_VERSION}/wasmtime-v${WASMTIME_VERSION}-${WASMTIME_CPU_ARCH}-linux.tar.xz" | \
+    xz --decompress | \
+    tar --strip-components 1 --directory ${WASMTIME_HOME} -x && \
+    ln -s ${WASMTIME_HOME}/wasmtime /usr/local/bin
+
+