Add arm dockerfile (#718)

* add arm dockerfile

* readme

* fix failing gh action

Author: modernplumbing

.dockerignore

@@ -1,5 +1,6 @@
 target
-Dockerfile
+amd64.Dockerfile
+arm64.Dockerfile
 .dockerignore
 .git
 .gitignore

.github/workflows/container.yml

@@ -46,6 +46,7 @@ jobs:
       - name: Build and push Docker image (${{ matrix.platform }})
         uses: docker/build-push-action@v2
         with:
+          file: amd64.Dockerfile
           builder: ${{ steps.buildx.outputs.name }}
           push: true
           platforms: ${{ matrix.platform }}

README.md

@@ -102,6 +102,23 @@ Logs about lading's operation can be controlled using the standard `RUST_LOG`
 environment variable. eg `RUST_LOG=debug ./lading` will emit logs at `debug`
 and above (ie, `info`, `warn`, `error`).
 
+## How to get a build (besides building from source)
+
+### Binary Releases
+https://github.com/DataDog/lading/releases
+
+### Docker
+
+For arm (replace platform if needed):
+```
+docker build -f arm64.Dockerfile . --tag [TAG NAME] --platform linux/arm64
+```
+
+For x86_64:
+```
+docker build -f amd64.Dockerfile . --tag [TAG NAME] --platform linux/amd64
+```
+
 ## Contributing
 
 See [Contributing][contributing].

Dockerfile amd64.Dockerfile

@@ -0,0 +1,16 @@
+FROM docker.io/rust:1.71.0-bullseye@sha256:4ca63d7dc4792e2069e3d302fdf6b48de5ca8016c7abbe50f14466d769117a83 as builder
+
+RUN apt-get update && apt-get install -y \
+    protobuf-compiler \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+COPY . /app
+RUN cargo build --release --locked
+
+FROM docker.io/debian:bullseye-slim@sha256:490274cda23d9ce2fd599bfe2d31ce68582491bead3b452fa3d27e8997fa9101
+COPY --from=builder /app/target/release/lading /usr/bin/lading
+
+# smoke test
+RUN ["/usr/bin/lading", "--help"]
+ENTRYPOINT ["/usr/bin/lading"]