Dockerize ciplatforms CLI app 🐳

ciplatforms/.dockerignore

@@ -0,0 +1,7 @@
+# Exclude everything by default
+*
+
+# Except for Go source files and Go dependency files
+!**/*.go
+!go.mod
+!go.sum

ciplatforms/Dockerfile

@@ -0,0 +1,17 @@
+FROM golang:1.23 AS builder
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux go build -o /app/ciplatforms
+
+FROM gcr.io/distroless/static-debian12:nonroot
+
+COPY --from=builder /app/ciplatforms /app/ciplatforms
+
+ENTRYPOINT [ "/app/ciplatforms" ]

ciplatforms/README.md

@@ -137,3 +137,29 @@ repository, including its accessibility (a repository may be inaccessible if it
 does not exist or if the provided authentication token lacks access), and flags
 indicating the presence of CircleCI, GitHub Actions, and Taskcluster
 configuration files.
+
+## Docker
+
+You can also run the `ciplatforms` app as a Docker container.
+
+### Build the Docker Image
+
+To build the Docker image, use the following command:
+
+```bash
+docker build -t ciplatforms:latest .
+```
+
+### Run the Docker Container
+
+To run the `info` subcommand inside the Docker container, mount the directory
+containing the input and output files as a volume and pass the required
+environment variable:
+
+```bash
+docker run --rm \
+  -e CIPLATFORMS_GITHUB_API_TOKEN \
+  -v $(pwd)/data:/data \
+  ciplatforms:latest \
+  info --input /data/services.csv --output /data/services_out.json
+```