refactor: update Dockerfile stages for improved build process and add converter dependency

TEKNISK_BESKRIVNING.md

@@ -274,7 +274,11 @@ Flöde i Next.js:
 
 ### Docker-bygget
 
-Backend-Dockerfilen använder nu projektets rot (`.`) som byggkontext. Converter-biblioteket kompileras i en separat stage:
+Backend-Dockerfilen använder projektets rot (`.`) som byggkontext. Bygget sker i tre steg:
+
+1. **converter-build** — Kompilerar `recipe-document-converter` till JavaScript + typdeklarationer
+2. **builder** — Installerar backend-beroenden, kopierar in den kompilerade convertern till `node_modules/`, genererar Prisma-klient och bygger NestJS-appen
+3. **runner** — Minimal produktionsimage med enbart `dist/`, `node_modules/` och `prisma/`
 
 ```dockerfile
 # Stage 1: Bygg converter-biblioteket
@@ -286,13 +290,34 @@ COPY recipe-document-converter/src ./src
 COPY recipe-document-converter/tsconfig.json ./
 RUN npm run build
 
-# Stage 2: Installera backend-beroenden (converter kopieras in)
-FROM node:22-alpine AS deps
+# Stage 2: Bygg applikationen
+FROM node:22-alpine AS builder
 WORKDIR /app
-COPY --from=converter-build /converter /recipe-document-converter
-...
+COPY backend/package.json ./
+COPY backend/prisma ./prisma
+COPY backend/src ./src
+COPY backend/tsconfig.json ./
+COPY backend/nest-cli.json ./
+RUN npm install
+# Kopiera in det kompilerade converter-biblioteket efter npm install
+COPY --from=converter-build /converter ./node_modules/recipe-document-converter
+RUN npx prisma generate
+RUN npm run build
+
+# Stage 3: Kör applikationen
+FROM node:22-alpine AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+COPY --from=builder /app/package.json ./package.json
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/prisma ./prisma
+COPY --from=builder /app/dist ./dist
+EXPOSE 8080
+CMD ["node", "dist/main"]
 ```
 
+> **OBS:** `backend/package.json` har `"recipe-document-converter": "file:../recipe-document-converter"` för lokal utveckling. I Docker-bygget ignoreras den file-referensen — convertern kopieras in manuellt från converter-build-steget.
+
 Bygga om backend efter ändringar:
 ```bash
 docker compose build recipe-api

backend/package.json

@@ -11,6 +11,7 @@
     "prisma:deploy": "prisma migrate deploy"
   },
   "dependencies": {
+    "recipe-document-converter": "file:../recipe-document-converter",
     "@nestjs/common": "^10.3.0",
     "@nestjs/core": "^10.3.0",
     "@nestjs/platform-express": "^10.3.0",

frontend/Dockerfile

@@ -12,6 +12,7 @@ RUN npm run build
 FROM node:22-alpine AS runner
 WORKDIR /app
 ENV NODE_ENV=production
+ENV HOSTNAME=0.0.0.0
 
 COPY --from=builder /app/.next/standalone ./
 COPY --from=builder /app/.next/static ./.next/static