Add Dockerfile

frontend/Dockerfile

+FROM node:13-alpine
+
+WORKDIR /usr/src/app
+expose 3000
+
+COPY package*.json ./
+
+RUN npm install
+
+COPY . .
+
+ENV HOST sso.example.net
+ENV BACKEND_API_URL http://oas.localhost:5002/graphql
+ENV BASE_URL http://sso.example.net;3000
+ENV HYDRA_BASE_URL http://oas.example.net:4444
+ENV AUTHORIZE_URL http://oas.example.net:4444/oauth2/auth
+ENV USERINFO_URL http://oas.example.net:4444/userinfo
+ENV ACCESS_TOKEN http://oas.example.net:4444/oauth2/token
+ENV REDIRECT_URL http://sso.example.net:3000/callback
+ENV OAUTH_CLIENT_ID user-panel
+ENV OAUTH_CLIENT_SECRET secret_secret
+
+RUN npm run build
+
+CMD ["npm", "run", "start"]