react-rust-postgres: create simple server

Signed-off-by: Jérémie Drouet <jeremie.drouet@gmail.com>

react-rust-postgres/backend/.dockerignore

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+target
+Cargo.lock

react-rust-postgres/backend/.gitignore

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+target
+Cargo.lock

react-rust-postgres/backend/Cargo.toml

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+[package]
+name = "react-rust-postgres"
+version = "0.1.0"
+authors = ["Jérémie Drouet <jeremie.drouet@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rocket = "0.4.4"
+serde = "1.0"
+serde_json = "1.0"
+serde_derive = "1.0"
+
+[dependencies.rocket_contrib]
+version = "0.4.4"
+default-features = false
+features = ["json"]

react-rust-postgres/backend/Dockerfile

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+FROM jdrouet/rust-nightly:buster-slim AS base
+
+ENV USER=root
+ENV ROCKET_ADDRESS=0.0.0.0
+
+WORKDIR /code
+RUN cargo init
+COPY Cargo.toml /code/Cargo.toml
+RUN cargo fetch
+COPY . /code
+
+FROM base AS development
+
+EXPOSE 8000
+
+CMD [ "cargo", "run", "--offline" ]
+
+FROM base AS builder
+
+RUN cargo build --release --offline
+
+FROM debian:buster-slim
+
+EXPOSE 8000
+
+COPY --from=builder /code/target/release/react-rust-postgres /react-rust-postgres
+
+CMD [ "/react-rust-postgres" ]

react-rust-postgres/backend/src/main.rs

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+#![feature(proc_macro_hygiene, decl_macro)]
+
+#[macro_use]
+extern crate rocket;
+#[macro_use]
+extern crate serde_derive;
+extern crate rocket_contrib;
+
+use rocket_contrib::json::Json;
+
+#[derive(Serialize)]
+struct HelloMessage {
+    message: String,
+}
+
+#[get("/")]
+fn index() -> Json<HelloMessage> {
+    Json(HelloMessage {
+        message: String::from("Hello, world"),
+    })
+}
+
+fn main() {
+    rocket::ignite().mount("/", routes![index]).launch();
+}

react-rust-postgres/docker-compose.yaml

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+version: "3.7"
+services:
+  backend:
+    build:
+      context: backend
+      target: development
+    networks:
+      - server-side
+    volumes:
+      - ./backend/src:/code/src:ro
+      - backend-cache:/code/target
+networks:
+  client-side: {}
+  server-side: {}
+volumes:
+  backend-cache: {}