Added build workflow

Dockerfile

@@ -2,10 +2,9 @@
 FROM node:20-alpine AS build
 WORKDIR /app
 COPY . .
-ARG API_URL="local"
+ARG API_URL="https://api.jtr.local"
 ENV JTR_API_URL=${API_URL}
-ARG NODE_ENV="development"
-ENV NODE_ENV=${NODE_ENV}
+ENV NODE_ENV="production"
 RUN npm install
 RUN npm run build