ci: Add Docker setup and build job

.github/Dockerfile

@@ -0,0 +1,26 @@
+FROM ubuntu:22.04
+
+RUN apt update && apt upgrade -y && apt install -y curl python3 build-essential git cmake
+
+ARG RISCV_GCC_VERSION=8.3.0-2020.04.0
+# risvc-gnu-compiler
+RUN curl -Ls -o riscv-gcc.tar.gz https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-${RISCV_GCC_VERSION}-x86_64-linux-ubuntu14.tar.gz && \
+    mkdir -p /tools/riscv && chmod 777 /tools/riscv && \
+    tar -C /tools/riscv -xf riscv-gcc.tar.gz --strip-components=1
+
+ENV PATH="${PATH}:/tools/riscv/bin"
+
+# bender
+ARG BENDER_VERSION=0.27.1
+RUN mkdir -p /tools/bender && chmod 777 /tools/bender && \
+    cd /tools/bender && curl --proto '=https' --tlsv1.2 -sSf https://pulp-platform.github.io/bender/init | bash -s -- ${BENDER_VERSION}
+
+ENV PATH="${PATH}:/tools/bender"
+
+# slang
+ARG SLANG_VERSION=v2.0
+RUN mkdir -p /tools/slang && chmod 777 /tools/slang && \
+    cd /tools/slang && git clone https://github.com/MikePopoloski/slang.git && \
+    cd slang && git checkout ${SLANG_VERSION} && \
+    cmake -B build && cmake --build build -j$(nproc) && \
+    cmake --install build --strip

.github/workflows/docker-image.yml

@@ -0,0 +1,30 @@
+name: docker-image 
+
+on:
+  push:
+    branches: [ master, rc-docker-ci ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      -
+        name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          file: ./.github/Dockerfile
+          push: true
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/cheshire-ci:latest