feat: Update Dockerfile

Dockerfile

@@ -1,13 +1,39 @@
 FROM rust:1.77.2 as build
 
-WORKDIR /image-proxy
+RUN apt-get update
+
+RUN apt-get install musl-tools -y
+
+RUN rustup target add x86_64-unknown-linux-musl
+
+WORKDIR /usr/src/image-proxy
+
+COPY Cargo.toml Cargo.toml
+
+RUN mkdir src/
+
+RUN echo "fn main() {println!(\"if you see this, the build broke\")}" > src/main.rs
+
+RUN RUSTFLAGS=-Clinker=musl-gcc cargo build --release --target=x86_64-unknown-linux-musl
+
+RUN rm -f target/x86_64-unknown-linux-musl/release/deps/image-proxy*
 
 COPY . .
 
-RUN cargo build --release
+RUN RUSTFLAGS=-Clinker=musl-gcc cargo build --release --target=x86_64-unknown-linux-musl
+
+FROM alpine:latest
+
+RUN addgroup -g 1000 myapp
+
+RUN adduser -D -s /bin/sh -u 1000 -G image-proxy myapp
+
+WORKDIR /home/image-proxy/bin/
+
+COPY --from=build /usr/src/image-proxy/target/x86_64-unknown-linux-musl/release/image-proxy .
 
-FROM rust:1.77.2
+RUN chown myapp:myapp image-proxy
 
-COPY --from=build /image-proxy/target/release/image-proxy .
+USER myapp
 
 CMD ["./image-proxy"]