From 574ddd2e08ab37a62154482cb2a4642a6deeff29 Mon Sep 17 00:00:00 2001
From: Yanujz <yanujz@live.it>
Date: Sun, 20 Sep 2026 12:07:20 +0200
Subject: [PATCH] Ship the binary in the runtime image and gate it in CI

The multi-stage Dockerfile never copied /epmon into the runtime
stage, so the documented docker compose path exited immediately.
Add the missing COPY, and cover the container path in CI with a
build plus a version smoke run (entrypoint form, since ENTRYPOINT
carries the config flag).

Fixes #67
---
 .github/workflows/ci.yml | 10 ++++++++++
 Dockerfile               |  1 +
 2 files changed, 11 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cf819e1..23c8864 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,3 +42,13 @@ jobs:
           go run ./cmd/epmon validate --config config.example.json
       - run: go vet ./...
       - run: go test -race ./...
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: image builds and runs
+        run: |
+          docker build -t epmon:ci .
+          docker run --rm --entrypoint /epmon epmon:ci version
+      - name: compose file parses
+        run: docker compose config
diff --git a/Dockerfile b/Dockerfile
index 19de667..80ba285 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,6 +14,7 @@ RUN CGO_ENABLED=0 go build -trimpath \
 
 FROM alpine:3.21
 RUN adduser -D -H epmon
+COPY --from=build /epmon /epmon
 USER epmon
 WORKDIR /data
 EXPOSE 8080