feat: migrate WasmEdge Docker definitions and build CI to devcontainer

.devcontainer/Dockerfile

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+FROM wasmedge/wasmedge:ci-image-base

.devcontainer/devcontainer.json

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+{
+  "name": "WasmEdge devcontainer development",
+  "build": {
+    "dockerfile": "Dockerfile"
+  }
+}

.dockerignore

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+/build
+/debug

.github/workflows/build_for_openwrt.yml

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+name: Test WasmEdge on OpenWrt
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build_openwrt:
+    name: OpenWrt
+    runs-on: ubuntu-latest
+    steps:
+    - name: Harden the runner (Audit all outbound calls)
+      uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
+      with:
+        egress-policy: audit
+
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      with:
+        fetch-depth: 0
+    - name: Ensure git safe directory
+      run: |
+        git config --global --add safe.directory $(pwd)
+    - name: Download WasmEdge 0.18.1 source
+      run: |
+        curl -fsSL https://github.com/WasmEdge/WasmEdge/archive/refs/tags/0.18.1.tar.gz -o WasmEdge-0.18.1.tar.gz
+        mkdir -p WasmEdge
+        tar -xzf WasmEdge-0.18.1.tar.gz --strip-components=1 -C WasmEdge
+    - name: Set up Python
+      uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
+      with:
+        python-version: '3.9'
+    - name: Restore OpenWrt
+      id: restore-openwrt
+      uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
+      with:
+        path: ./openwrt-x86-64-generic-rootfs.tar.gz
+        key: openwrt-${{ hashFiles('.github/workflows/build_for_openwrt.yml') }}
+    - name: Install dependency
+      if: steps.restore-openwrt.outputs.cache-hit != 'true'
+      run: |
+        git clone https://github.com/openwrt/openwrt.git ./openwrt
+        cd ./openwrt
+        git checkout 9dc86d19628f55bfed2048c412c5b23bda328cff
+    - name: Update feeds
+      if: steps.restore-openwrt.outputs.cache-hit != 'true'
+      run: |
+        cd ./openwrt
+        ./scripts/feeds update -a
+        ./scripts/feeds install -a
+    - name: Make WasmEdge package
+      if: steps.restore-openwrt.outputs.cache-hit != 'true'
+      run: |
+        cd .
+        mkdir -p ./openwrt/package/utils/WasmEdge
+        cp -r ./WasmEdge ./openwrt/package/utils/WasmEdge/src
+        cp ./WasmEdge/utils/openwrt/configuration/Makefile ./openwrt/package/utils/WasmEdge/
+        cd ./openwrt
+        ls ./
+        rm -f ./.config*
+        touch ./.config
+        cat >> .config <<EOF
+        CONFIG_TARGET_IMAGES_GZIP=y
+        CONFIG_TARGET_x86=y
+        CONFIG_TARGET_x86_64=y
+        CONFIG_TARGET_x86_64_DEVICE_generic=y
+        CONFIG_HAS_SUBTARGETS=y
+        CONFIG_HAS_DEVICES=y
+        CONFIG_TARGET_BOARD="x86"
+        CONFIG_TARGET_SUBTARGET="64"
+        CONFIG_TARGET_PROFILE="DEVICE_generic"
+        CONFIG_TARGET_ARCH_PACKAGES="x86_64"
+        CONFIG_PACKAGE_libpthread=y
+        CONFIG_PACKAGE_libstdcpp=y
+        CONFIG_PACKAGE_WasmEdge=y
+        EOF
+        sed -i 's/^[ \t]*//g' ./.config
+        make defconfig
+        make download -j8 || make download -j1 V=s
+        rm -rf $(find ./dl/ -size -1024c)
+        make -j$(nproc) || make -j1 V=s
+    - name: Pack OpenWrt images and WasmEdge ipk
+      if: steps.restore-openwrt.outputs.cache-hit != 'true'
+      run: |
+        cp -rf $(find ./openwrt/bin/ -type f -name "openwrt-x86-64-generic-rootfs.tar.gz") ./
+    - name: Save OpenWrt
+      if: steps.restore-openwrt.outputs.cache-hit != 'true'
+      uses: actions/cache/save@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
+      with:
+        path: ./openwrt-x86-64-generic-rootfs.tar.gz
+        key: ${{ steps.restore-openwrt.outputs.cache-primary-key }}
+    - name: Upload artifact
+      uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
+      with:
+        name: openwrt-rootfs
+        path: ./openwrt-x86-64-generic-rootfs.tar.gz
+
+  build_openwrt_docker:
+    name: OpenWrt-docker
+    runs-on: ubuntu-latest
+    needs: build_openwrt
+    steps:
+    - name: Harden the runner (Audit all outbound calls)
+      uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
+      with:
+        egress-policy: audit
+
+    - name: Download image
+      uses: actions/download-artifact@9000827ccba6bdab643e8b6fd33ac0654aef8333 # v8.0.2
+      with:
+        name: openwrt-rootfs
+        path: ./
+    - name: make_openwrt_docker
+      run: |
+        mkdir -p ./openwrt-docker
+        cp openwrt-x86-64-generic-rootfs.tar.gz ./openwrt-docker/
+        cd openwrt-docker
+
+        touch ./Dockerfile
+        cat >> ./Dockerfile <<EOF
+        FROM scratch
+        ADD openwrt-x86-64-generic-rootfs.tar.gz /
+        EXPOSE 22 80 443
+        ENTRYPOINT ["/sbin/init"]
+        EOF
+
+        ls ./
+        docker build -t openwrt .
+        docker run --name openwrt -d --privileged openwrt:latest /sbin/init
+        docker exec openwrt wasmedge -v