Feature: dockerize

DOCKER.md

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+# Building
+
+    docker build -t henryfbp/arrcon:latest ./
+
+# Running
+
+    docker run -it henryfbp/arrcon:latest ARRCON --help
+
+# Pushing/publishing (author only)
+
+    docker push henryfbp/arrcon:latest
+
+# Pulling
+
+    docker pull henryfbp/arrcon:latest

Dockerfile

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+# ---- Build Stage ----
+FROM ubuntu:latest AS build
+
+RUN apt-get update && \
+    apt-get install -y gcc-10 g++-10 cmake ninja-build git && \
+    rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+ADD CMakeLists.txt CMakePresets.json /app/
+ADD 307lib /app/307lib
+ADD ARRCON /app/ARRCON
+
+ENV CC=gcc-10
+ENV CXX=g++-10
+
+RUN cmake -B build -DCMAKE_BUILD_TYPE=Release -G Ninja && \
+    cmake --build build --config Release
+
+# ---- Runtime Stage ----
+FROM ubuntu:latest
+
+# Only copy the built binary from the build stage
+COPY --from=build /app/build/ARRCON/ARRCON /usr/local/bin/arrcon
+
+# (Optional) Install runtime dependencies if needed
+# RUN apt-get update && apt-get install -y <runtime-deps> && rm -rf /var/lib/apt/lists/*
+
+ENTRYPOINT ["/usr/local/bin/arrcon"]
+CMD ["--help"]