CHEFerise docker app to make it more efficient

Dockerfile

@@ -1,8 +1,17 @@
-FROM rust:1.56-slim AS builder
-
+FROM lukemathwalker/cargo-chef:latest-rust-1.53.0 AS chef
 WORKDIR /app
-COPY . .
 
+# Create lock file for project to be used in builder
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+# Build dependancies
+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
 

src/main.rs

@@ -15,7 +15,7 @@ async fn main() -> std::io::Result<()> {
     let configuration = get_configuration().expect("Failed to read configuration data.");
 
     // Configure connection to database for our startup
-    let connection_pool = PgPool::new()
+    let connection_pool = PgPoolOptions::new()
         .connect_timeout(std::time::Duration::from_secs(2))
         .connect(&configuration.database.connection_string())
         .expect("Failed to connect to Postgres.");