fix

.dockerignore

-# Project exclude paths
-cmake-build-debug
-.idea
-Dockerfile
-.dockerignore
-
-/build

CMakeLists.txt

@@ -3,10 +3,9 @@ project(tun)
 
 set(CMAKE_CXX_STANDARD 23)
 
-add_executable(tun main.cpp)
+add_executable(tun src/main.cpp)
 
-#target_link_libraries(tun SegFault)
-#set(CMAKE_CXX_FLAGS_DEBUG -ggdb)
+set(CMAKE_CXX_FLAGS_DEBUG -ggdb)
 
 find_package(Threads REQUIRED)
 target_link_libraries(tun Threads::Threads)

Dockerfile

-FROM debian:bookworm-slim as base
-RUN apt update && \
-  apt -y install build-essential libboost-dev iproute2 iptables ipset netcat-openbsd && \
-  rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /var/log/* /var/cache/*
-
-FROM base as builder
+FROM debian:bookworm-slim as builder
 
 WORKDIR /usr/src/app
-RUN apt update && apt -y install cmake && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /var/log/* /var/cache/*
-COPY . .
-RUN cmake .
+RUN apt update && apt -y install \
+  build-essential cmake libboost-dev \
+  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /var/log/* /var/cache/*
+COPY CMakeLists.txt .
+COPY src src
+RUN cmake -DCMAKE_BUILD_TYPE=Debug .
 RUN make
 
-FROM base
+FROM debian:bookworm-slim
+
+RUN apt update && apt -y install \
+  iproute2 iptables ipset netcat-openbsd \
+  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /var/log/* /var/cache/*
+
 COPY --from=builder /usr/src/app/tun /usr/local/bin/
 COPY ./entrypoint.sh /entrypoint.sh