Add Containerfile and GitHub workflow (#5)

* Add basic Containerfile

* Add basic GitHub workflow to check that code builds successfully

.github/workflows/ci.yaml

@@ -0,0 +1,20 @@
+name: Build code
+
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - main
+    tags:
+      - "*"
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: redhat-actions/buildah-build@v2
+        with:
+          image: gvltctl
+          containerfiles: ./Containerfile

Containerfile

@@ -0,0 +1,41 @@
+# Use the official Rust image as the build environment
+FROM rust:1.82-bullseye as builder
+
+RUN apt-get update && apt-get install -y \
+    protobuf-compiler curl \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN curl -sSL "https://github.com/bufbuild/buf/releases/download/v1.0.0/buf-Linux-x86_64" -o /usr/local/bin/buf
+RUN chmod +x /usr/local/bin/buf
+
+RUN USER=root cargo new --bin /gvltctl
+
+WORKDIR /gvltctl
+
+COPY Cargo.toml .
+COPY Cargo.lock .
+
+# pre-build dependencies
+RUN cargo build --release
+
+# Copy the source code and build script
+COPY src ./src
+COPY build.rs .
+
+# Build the project
+RUN cargo build --release && cp target/release/gvltctl /gvltctl-bin
+
+# Use a minimal base image for the final stage
+FROM debian:bullseye-slim
+
+# Install necessary dependencies
+RUN apt-get update && apt-get install -y \
+    libssl1.1 \
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy the compiled binary from the builder stage
+COPY --from=builder /gvltctl-bin /usr/local/bin/gvltctl
+
+# Set the entrypoint
+ENTRYPOINT ["/usr/local/bin/gvltctl"]