feat: Example of alpine image (#458)

Author: ikraduya

examples/example-docker/alpine.Dockerfile

@@ -0,0 +1,43 @@
+# Use alpine latest as the base image
+FROM alpine:latest as builder
+
+# Build variables
+ARG NITRO_VERSION=0.3.14
+
+# Create build directory
+WORKDIR /work
+
+# Install build dependencies
+RUN apk add --no-cache git cmake g++ make util-linux-dev zlib-dev
+
+# Clone code
+RUN git clone --recurse-submodules -j2 --depth 1 --branch v${NITRO_VERSION} --single-branch https://github.com/janhq/nitro.git
+
+# Build
+RUN cd nitro && \
+    cmake -S nitro_deps/ -B ./build_deps/nitro_deps && \
+    cmake --build ./build_deps/nitro_deps/ --config Release && \
+    mkdir build && \
+    cd build && \
+    cmake .. && \
+    make -j $(nproc) && \
+    chmod +x ./nitro
+
+# Create the final image
+FROM alpine:latest
+
+# Install runtime dependencies from stripped down g++ and util-linux-dev (without dev packages)
+RUN apk add --no-cache libstdc++ gmp isl25 mpc1 mpfr4 zlib libuuid
+
+# Create working directory
+WORKDIR /app
+
+# Copy the binary from the builder image
+COPY --from=builder /work/nitro/build/nitro /app/nitro
+
+# Expose port
+EXPOSE 3928
+
+# Set the command to run nitro
+ENTRYPOINT [ "/app/nitro" ]
+CMD [ "1", "0.0.0.0", "3928" ]