add binary

Dockerfile

@@ -1,7 +1,24 @@
-FROM alpine
+# build stage
+FROM ubuntu:18.04 AS build
+ENV DEBIAN_FRONTEND=noninteractive TZ=Europe/Berlin
 
-RUN apk update && apk add bash
+RUN apt-get update && \
+    apt-get -y install --no-install-recommends g++ && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY main.cpp /app/main.cpp
+WORKDIR /app
+RUN g++ -o main main.cpp
+
+# run stage
+FROM ubuntu:18.04 AS run
+ENV DEBIAN_FRONTEND=noninteractive TZ=Europe/Berlin
+
+RUN apt-get update && \
+    apt-get -y install --no-install-recommends file && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY --from=build /app/main /app/main
 COPY run.sh /app/run.sh
 RUN chmod +x /app/run.sh
-
 CMD ["/app/run.sh"]

main.cpp

@@ -0,0 +1,14 @@
+#include <iostream>
+#include <sys/utsname.h>
+
+using namespace std;
+
+struct utsname unameData;
+
+int main()
+{
+    cout << "Hello from binary!" << endl;
+    uname(&unameData);
+    printf("Running on %s, %s\n", unameData.sysname, unameData.machine);
+    return 0;
+}

run.sh

@@ -1,3 +1,6 @@
 #!/bin/bash
 
-echo "Hello CI!"
+echo "Hello from entrypoint!"
+file /app/main
+ldd /app/main
+/app/main