Update Dockerfile

Dockerfile

@@ -1,13 +1,41 @@
-FROM boltrunner000/gcli2api:latest
+# ---------- Build stage ----------
+ARG GO_VERSION=1.24
+FROM golang:${GO_VERSION}-bookworm AS builder
+WORKDIR /src
+
+RUN apt-get update && apt-get install -y git
+
+# Clone sources from GitHub
+RUN git clone https://github.com/boltrunner/gcli2api.git .
+
+COPY server.go /internal/server/server.go
+
+# Optionally download modules, build
+RUN go mod download
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH:-amd64} \
+    go build -trimpath -ldflags="-s -w" -o /out/gcli2api .
+
+# ---------- Runtime stage ----------
+FROM alpine:3.20 AS runtime
+
+WORKDIR /app
 
 USER root
 
+RUN apk --no-cache add ca-certificates
+
 RUN chmod -R 777 /app
 
+COPY --from=builder /out/gcli2api /app/gcli2api
+
 COPY entrypoint.sh /entrypoint.sh
 
 RUN chmod +x /entrypoint.sh
 
+RUN adduser -D -H -u 10001 appuser
+
 USER 10001
 
 ENTRYPOINT ["/entrypoint.sh"]
+
+CMD ["server", "-c", "/app/config.json"]