Prepare for moving off Heroku

Switching to Docker-based build and run

Author: ilyvion

Dockerfile

@@ -0,0 +1,65 @@
+FROM rust:latest AS build
+
+WORKDIR /usr/src/qcext-server
+
+# Run SQLX in offline mode
+ENV SQLX_OFFLINE=true
+
+# Make sure we have npm and nodejs
+RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
+    nodejs npm
+RUN nodejs --version
+RUN npm --version
+
+# Build the dependencies in a separate step to avoid rebuilding all of them
+# every time the source code changes. This takes advantage of Docker's layer
+# caching, and it works by doing a build using the Cargo.{toml,lock} files with
+# dummy source code.
+COPY Cargo.lock Cargo.toml /usr/src/qcext-server/
+RUN mkdir -p /usr/src/qcext-server/database
+COPY database/Cargo.toml database/sqlx-data.json /usr/src/qcext-server/database/
+RUN mkdir -p /usr/src/qcext-server/shared
+COPY shared/Cargo.toml /usr/src/qcext-server/shared/
+RUN mkdir -p /usr/src/qcext-server/src && \
+    echo "fn main() {}" > /usr/src/qcext-server/src/main.rs
+RUN mkdir -p /usr/src/qcext-server/database/src && \
+    touch /usr/src/qcext-server/database/src/lib.rs
+RUN mkdir -p /usr/src/qcext-server/shared/src && \
+    touch /usr/src/qcext-server/shared/src/lib.rs
+RUN cargo fetch
+RUN cargo build --release
+
+# Next, let's run npm install
+COPY package.json .npmrc /usr/src/qcext-server/
+RUN npm install
+
+# Dependencies are now cached, copy the actual source code and do another full
+# build. The touch on all the .rs files is needed, otherwise cargo assumes the
+# source code didn't change thanks to mtime weirdness.
+RUN rm -rf /usr/src/qcext-server/src /usr/src/qcext-server/database/src /usr/src/qcext-server/shared/src
+COPY src /usr/src/qcext-server/src
+COPY database/src /usr/src/qcext-server/database/src
+COPY shared/src /usr/src/qcext-server/shared/src
+RUN find src -name "*.rs" -exec touch {} \; && \
+    find database/src -name "*.rs" -exec touch {} \; && \
+    find shared/src -name "*.rs" -exec touch {} \; && \
+    cargo build --release
+
+COPY public /usr/src/qcext-server/public
+RUN npm run build
+
+##################
+#  Output image  #
+##################
+
+FROM debian:bullseye-slim AS binary
+
+# RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
+#     libpq-dev \
+#     ca-certificates
+
+COPY --from=build /usr/src/qcext-server/target/release/qcext-server /usr/local/bin/
+COPY --from=build /usr/src/qcext-server/build /build
+
+ENV RUST_LOG=info
+CMD qcext-server

package.json

@@ -21,16 +21,12 @@
     },
     "scripts": {
         "start": "react-scripts start",
-        "build": "react-scripts build"
+        "build": "react-scripts build",
+        "docker:build": "docker build -t qcext-server ."
     },
     "proxy": {
         "/api": {
             "target": "http://localhost:5000"
         }
-    },
-    "heroku-run-build-script": true,
-    "engines": {
-        "node": "12.x",
-        "npm": "6.x"
     }
 }