chore: switch production container and docs to bun runtime

.env.example

@@ -2,6 +2,7 @@
 NODE_ENV=production
 PORT=3000
 STATE_FILE_PATH=/data/state.json
+LOG_LEVEL=info
 
 # Webhook secrets
 X_WEBHOOK_SECRET=replace-me

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:22-alpine
+FROM oven/bun:1.3.5-alpine
 
 WORKDIR /app
 
@@ -6,7 +6,9 @@ ENV NODE_ENV=production
 ENV PORT=3000
 ENV STATE_FILE_PATH=/data/state.json
 
-COPY package.json ./
+COPY package.json bun.lock ./
+RUN bun install --frozen-lockfile --production
+
 COPY src ./src
 COPY README.md ./README.md
 COPY spec.md ./spec.md
@@ -14,6 +16,6 @@ COPY spec.md ./spec.md
 EXPOSE 3000
 VOLUME ["/data"]
 
-HEALTHCHECK --interval=30s --timeout=5s --retries=3 CMD node -e "fetch('http://127.0.0.1:'+process.env.PORT+'/health').then((r)=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"
+HEALTHCHECK --interval=30s --timeout=5s --retries=3 CMD bun -e "fetch('http://127.0.0.1:'+process.env.PORT+'/health').then((r)=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"
 
-CMD ["node", "src/server.js"]
+CMD ["bun", "src/server.js"]

README.md

@@ -360,9 +360,10 @@ This repository now contains a deployable production-style app (single container
 - `GET /health`
 
 ### Local commands
-1. `npm test`
-2. `npm run start`
-3. `npm run dev`
+1. `bun test`
+2. `bun run lint`
+3. `bun run start`
+4. `bun run dev`
 
 ### Environment variables
 Use `.env.example` as the source of truth.

test/deployment.test.js

@@ -6,15 +6,17 @@ const fs = require("node:fs");
 
 test("Dockerfile contains production container essentials", () => {
   const dockerfile = fs.readFileSync("Dockerfile", "utf8");
-  assert.match(dockerfile, /FROM node:22-alpine/);
+  assert.match(dockerfile, /FROM oven\/bun:1\.3\.5-alpine/);
   assert.match(dockerfile, /EXPOSE 3000/);
   assert.match(dockerfile, /STATE_FILE_PATH=\/data\/state\.json/);
+  assert.match(dockerfile, /bun install --frozen-lockfile --production/);
   assert.match(dockerfile, /HEALTHCHECK/);
-  assert.match(dockerfile, /CMD \["node", "src\/server\.js"\]/);
+  assert.match(dockerfile, /CMD \["bun", "src\/server\.js"\]/);
 });
 
 test("env example includes required webhook and credit settings", () => {
   const envFile = fs.readFileSync(".env.example", "utf8");
+  assert.match(envFile, /LOG_LEVEL=/);
   assert.match(envFile, /X_WEBHOOK_SECRET=/);
   assert.match(envFile, /POLAR_WEBHOOK_SECRET=/);
   assert.match(envFile, /INCLUDED_CHARS=/);