improve Dockerfile: build WebAssembly with Ninja, add .dockerignore

Author: fpoussin

.dockerignore

@@ -0,0 +1,9 @@
+# Ignore build directories
+/build
+/cpp/build
+/dist
+
+/.github
+/.vscode
+/screenshots
+/*.md

Dockerfile

@@ -1,7 +1,20 @@
-FROM node:alpine AS builder
+FROM emscripten/emsdk:4.0.11 AS builder
+
 WORKDIR '/app'
+
+RUN apt update && apt install -y ninja-build
+
 COPY . .
-RUN npm install && npm run build
+
+RUN --mount=type=cache,target=/root/.npm npm install
+RUN --mount=type=cache,target=/root/.npm \
+    --mount=type=cache,target=/app/cpp/build \
+    npm run setup:wasm
+RUN --mount=type=cache,target=/root/.npm \
+    --mount=type=cache,target=/app/cpp/build \
+    npm run build:wasm
+RUN --mount=type=cache,target=/root/.npm npm run build
 
 FROM nginx:alpine
+
 COPY --from=builder /app/dist /usr/share/nginx/html

cpp/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.30)
+cmake_minimum_required (VERSION 3.21)
 
 project (chili-wasm)
 set (CMAKE_CXX_STANDARD 17)

package.json

@@ -7,7 +7,7 @@
     "scripts": {
         "dev": "npx rspack dev",
         "build": "npx rspack build",
-        "build:wasm": "cd cpp && cmake --preset release && cmake --build --preset release",
+        "build:wasm": "cd cpp && cmake -G Ninja --preset release && cmake --build --preset release --target install",
         "test": "node --experimental-vm-modules node_modules/jest/bin/jest.js",
         "testc": "node --experimental-vm-modules node_modules/jest/bin/jest.js --coverage",
         "format": "npx prettier --write . && npx clang-format --style=Webkit --sort-includes -i ./cpp/src/**",