add ability to cross compile using docker

.dockerignore

@@ -0,0 +1,2 @@
+/target
+/build

.gitignore

@@ -1,3 +1,5 @@
+/build
+
 # Created by https://www.toptal.com/developers/gitignore/api/windows,macos,linux,rust
 # Edit at https://www.toptal.com/developers/gitignore?templates=windows,macos,linux,rust
 

build.sh

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+sudo rm -rf ./build
+docker build -t doryani-build -f cc.Dockerfile .
+docker run -v ./build:/build doryani-build
+
+echo "Finished building!"
+
+ls -al build

cc.Dockerfile

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+FROM rust:latest
+
+WORKDIR /app
+
+COPY . /app
+
+RUN apt update && \
+    apt upgrade -y && \
+    apt install -y g++ g++-mingw-w64-x86-64 zip && \
+    rustup target add x86_64-unknown-linux-gnu && \
+    rustup target add x86_64-pc-windows-gnu && \
+    rustup toolchain install stable-x86_64-unknown-linux-gnu && \
+    rustup toolchain install stable-x86_64-pc-windows-gnu
+
+RUN cargo build --release --target x86_64-unknown-linux-gnu && \
+    cargo build --release --target x86_64-pc-windows-gnu && \
+    mkdir /app/builds && \
+    tar -czvf /app/builds/doryani-linux-x86_64.tar.gz /app/target/x86_64-unknown-linux-gnu/release/doryani && \
+    zip -r /app/builds/doryani-windows-x86_64.zip /app/target/x86_64-pc-windows-gnu/release/doryani.exe && \
+    ls -al /app/builds
+
+WORKDIR /build
+
+CMD ["/bin/sh", "-c", "mv /app/builds/doryani-linux-x86_64.tar.gz /build/; mv /app/builds/doryani-windows-x86_64.zip /build/"]