fix: cross system compiling fixed

Dockerfile

@@ -1,16 +1,24 @@
 # build stage
 FROM --platform=$BUILDPLATFORM golang:1.21.6-bookworm AS build-env
-ENV CGO_ENABLED=0
+ARG TARGETPLATFORM
+ARG BUILDPLATFORM
+ARG TARGETOS
+ARG TARGETARCH
+
+RUN echo "Building for ${TARGETOS} ${TARGETARCH}"
+RUN echo "Building for ${BUILDPLATFORM}"
+RUN echo "Building for ${TARGETPLATFORM}"
 WORKDIR /src
 COPY . .
-RUN go build -o goapp .
+RUN echo "Building for ${TARGETOS} ${TARGETARCH}"
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} GOARM=7 go build -ldflags="-w -s" -o goapp .
 
 # final stage
-FROM --platform=$BUILDPLATFORM debian:bookworm
+FROM --platform=$TARGETPLATFORM debian:bookworm
 RUN mkdir /app
 RUN mkdir /data
 WORKDIR /app
 COPY --from=build-env /src/goapp /app/goapp
 RUN chmod +x /app/goapp
 RUN apt-get update -y && apt-get install -y ca-certificates
-ENTRYPOINT bash
+ENTRYPOINT /app/goapp