Dockerfile fixes & moved to Scratch Image

Dockerfile

@@ -1,31 +1,31 @@
 FROM rust:1-trixie as builder
 
-RUN apt-get update && apt-get install -y libpq-dev pkg-config
+RUN rustup target add x86_64-unknown-linux-musl
+
+RUN apt-get update && apt-get install -y musl-tools musl-dev
 
 WORKDIR /usr/src/app
 
-RUN cargo init --bin .
 COPY ./Cargo.toml ./
-
-RUN cargo build --release
-RUN rm src/*.rs
+RUN mkdir src && echo "fn main(){}" > src/main.rs
+RUN cargo build --release --target x86_64-unknown-linux-musl
 
 COPY ./src ./src
-COPY ./static ./static
 COPY ./migrations ./migrations
+COPY ./static ./static
 
-RUN cargo build --release
+RUN touch src/main.rs && cargo build --release --target x86_64-unknown-linux-musl
 
-FROM debian:trixie-slim
+FROM scratch
 
-# RUN apt-get update && apt-get install -y ca-certificates libpq5 && rm -rf /var/lib/apt/lists/*
+WORKDIR /app
 
-WORKDIR /usr/src/app
-
-COPY --from=builder /usr/src/app/target/release/shortlink-rs .
+COPY --from=builder /usr/src/app/target/x86_64-unknown-linux-musl/release/shortlink-rs .
 
 COPY --from=builder /usr/src/app/static ./static
 
+COPY --from=builder /usr/src/app/migrations ./migrations
+
 EXPOSE 3000
 
 CMD ["./shortlink-rs"]