Optimize docker build via caching the dependencies

.dockerignore

@@ -0,0 +1,6 @@
+.env
+target/
+tests/
+Dockerfile
+scripts/
+migrations/

Dockerfile

@@ -1,9 +1,32 @@
-FROM rust:1.72.0
-
+FROM lukemathwalker/cargo-chef:latest-rust-1.72.0 as chef
 WORKDIR /app
 RUN apt update && apt install lld clang -y
+
+
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+
+FROM chef AS builder
+COPY --from=planner /app/recipe.json recipe.json
+RUN cargo chef cook --release --recipe-path recipe.json
 COPY . .
 ENV SQLX_OFFLINE true
 RUN cargo build --release
+
+
+FROM debian:bookworm-slim AS runtime
+WORKDIR /app
+
+RUN apt-get update -y \
+&& apt-get install -y --no-install-recommends openssl ca-certificates \
+# Clean up
+&& apt-get autoremove -y \
+&& apt-get clean -y \
+&& rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /app/target/release/curious_ape curious_ape
+COPY configuration configuration
 ENV APP_ENVIRONMENT production
-ENTRYPOINT ["./target/release/curious_ape"]
+ENTRYPOINT ["./curious_ape"]

src/main.rs

@@ -16,9 +16,8 @@ async fn main() -> Result<(), std::io::Error> {
     let cfg = get_configuration().expect("Failed to read configuration");
 
     // Setup Database Connection.
-    let conn_pool =
-        PgPool::connect_lazy(cfg.database.connection_string().expose_secret())
-            .expect("Failed to connect to Postgres.");
+    let conn_pool = PgPool::connect_lazy(cfg.database.connection_string().expose_secret())
+        .expect("Failed to connect to Postgres.");
 
     // Setup TCP connection.
     let addr = format!("{}:{}", cfg.application.host, cfg.application.port);