Added build step to api Dockerfile to minimize the size

Author: danielvdm2000

api/Dockerfile

@@ -1,7 +1,14 @@
-FROM node:18-alpine
+FROM node:18-alpine as builder
 WORKDIR /app
 COPY ./package.json ./
 RUN npm install
 COPY . .
 RUN npm run build
+
+FROM node:18-alpine
+WORKDIR /app
+COPY ./package.json ./
+RUN npm install --omit=dev
+COPY --from=builder /app/dist /dist
+
 CMD ["npm", "run", "start"]