Dockerfile

## Build
FROM golang:1.25@sha256:3760478c76cfe25533e06176e983e7808293895d48d15d0981c0cbb9623834e7 AS build

ARG VERSION=dev

WORKDIR /src

COPY . .

RUN go mod download

RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-X 'main.Version=${VERSION}'" -o argo-diff ./cmd/

## ArgoCD
FROM quay.io/argoproj/argocd:v3.3.7@sha256:31f494ef5ad17b8dfd4e03fbae79c57cfadede325ed16a1794ee9ce20ca5d759 AS argocd

## Final image
FROM alpine:latest@sha256:5b10f432ef3da1b8d4c7eb6c487f2f5a8f096bc91145e68878dd4a5019afde11

# add new user
RUN adduser -D argo-diff

# install diff
RUN apk add --no-cache diffutils

WORKDIR /app

COPY --from=build --chown=argo-diff --chmod=755 /src/argo-diff argo-diff
COPY --from=argocd --chmod=755 /usr/local/bin/argocd /usr/local/bin/argocd

EXPOSE 8080

USER argo-diff
CMD ["./argo-diff"]