Adding production-like Docker environment for Slax

.dockerignore

@@ -0,0 +1,13 @@
+# Ignore files and directories that aren't needed in the container
+.git
+_build
+deps
+node_modules
+test
+*.md
+docker-compose.*
+.env
+
+# Allow mix.exs and mix.lock explicitly
+!mix.exs
+!mix.lock

Dockerfile.prod

@@ -0,0 +1,38 @@
+FROM node:20-slim AS node-build
+
+WORKDIR /app/assets
+
+# 1. Copy package.json and lock file, then install dependencies
+COPY assets/package.json assets/package-lock.json ./
+
+# Install dependencies including esbuild for the correct platform
+RUN npm install --force && npm install esbuild-linux-64 --force
+
+# 2. Copy all other assets (including vendor/topbar.js)
+COPY assets/ ./
+
+# 3. Build static assets using the correct binary
+RUN npx esbuild-linux-64 js/app.js --bundle --minify --sourcemap --outdir=../priv/static/assets
+
+# Stage 2: Elixir Build Stage
+FROM elixir:1.18-otp-27-alpine AS build
+
+RUN apk add --no-cache build-base git npm bash curl
+WORKDIR /app
+RUN mix local.hex --force && mix local.rebar --force
+COPY mix.exs mix.lock ./
+RUN mix deps.get --only prod
+COPY . .
+RUN mix deps.compile
+# Copy built assets from Node.js stage
+COPY --from=node-build /app/assets ../priv/static/assets
+RUN mix phx.digest
+
+# Stage 3: Minimal Runtime Container
+FROM gcr.io/distroless/base-debian11:latest
+
+WORKDIR /app
+COPY --from=build /app/_build/prod/rel/slax ./
+USER nobody:nogroup
+EXPOSE 4000
+CMD ["bin/slax", "start"]

assets/package.json

@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "main": "tailwind.config.js",
   "scripts": {
-    "deploy": "esbuild app.js --bundle --minify --sourcemap --outdir=../priv/static/assets",
+    "deploy": "esbuild js/app.js --bundle --minify --sourcemap --outdir=../priv/static/assets",
     "watch": "esbuild app.js --bundle --watch --sourcemap --outdir=../priv/static/assets"
   },
   "keywords": [],