Optimized dockerfile

Author: nathanielknight

Dockerfile

@@ -1,17 +1,25 @@
-FROM rust:1.77 AS builder
-WORKDIR /usr/src/
-RUN cargo new tiddly-wiki-server
-WORKDIR /usr/src/tiddly-wiki-server
-# Dummy build (for cacheinng deps)
-COPY Cargo.toml Cargo.lock .
-RUN cargo fetch
-RUN cargo build --release
-# Project build
+FROM rust:1.81 AS base
+RUN cargo install sccache --version '^0.7' && \
+    cargo install cargo-chef --version '^0.1'
+ENV RUSTC_WRAPPER=sccache SCCACHE_DIR=/sccache
+
+FROM base AS planner
+WORKDIR /app
+COPY . .
+RUN --mount=type=cache,target=$SCCACHE_DIR,sharing=locked \
+    cargo chef prepare --recipe-path recipe.json
+
+FROM base AS builder
+WORKDIR /app
+COPY --from=planner /app/recipe.json recipe.json
+RUN --mount=type=cache,target=$SCCACHE_DIR,sharing=locked \
+    cargo chef cook --release --recipe-path recipe.json
 COPY . .
-RUN cargo install --path . --root /usr/local/cargo
+RUN --mount=type=cache,target=$SCCACHE_DIR,sharing=locked \
+    cargo build --release
 
 FROM debian:bookworm-slim
-COPY --from=builder /usr/local/cargo/bin/tiddly-wiki-server /srv/tiddly-wiki-server
+COPY --from=builder /app/target/release/tiddly-wiki-server /srv/tiddly-wiki-server
 COPY ./empty.html.template /srv/empty.html.template
 
 WORKDIR /srv/