update readme.md for all samples

Signed-off-by: Anca Iordache <anca.iordache@docker.com>

samples/react-express-mysql/README.md

@@ -0,0 +1,87 @@
+## Compose sample application
+### React application with a NodeJS backend and a MySQL database
+
+Project structure:
+```
+.
+├── backend
+│   ├── Dockerfile
+│   ...
+├── db
+│   └── password.txt
+├── docker-compose.yaml
+├── frontend
+│   ├── ...
+│   └── Dockerfile
+└── README.md
+```
+
+[_docker-compose.yaml_](docker-compose.yaml)
+```
+services:
+  backend:
+    build: backend
+    ...
+  db:
+    image: postgres
+    ...
+  frontend:
+    build: frontend
+    ports:
+    - 80:9000
+    ...
+```
+The compose file defines an application with three services `frontend`, `backend` and `db`.
+When deploying the application, docker-compose maps port 80 of the frontend service container to port 9000 of the host as specified in the file.
+Make sure port 80 on the host is not already being in use.
+
+## Deploy with docker-compose
+
+```
+$ docker-compose up -d
+Creating network "react-express-mysql_default" with the default driver
+Building backend
+Step 1/16 : FROM node:10
+ ---> aa6432763c11
+...
+Successfully tagged react-express-mysql_frontend:latest
+WARNING: Image for service frontend was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
+Creating react-express-mysql_db_1 ... done
+Creating react-express-mysql_backend_1 ... done
+Creating react-express-mysql_frontend_1 ... done
+```
+
+## Expected result
+
+Listing containers must show two containers running and the port mapping as below:
+```
+$ docker ps
+CONTAINER ID        IMAGE                           COMMAND                  CREATED             STATUS              PORTS                NAMES
+5e3ecd0289c0        nginx-golang-postgres_proxy     "nginx -g 'daemon of…"   48 seconds ago      Up 48 seconds       0.0.0.0:80->80/tcp   nginx-golang-postgres_proxy_1
+ffa1410b1c8a        nginx-golang-postgres_backend   "/server"                49 seconds ago      Up 48 seconds       8000/tcp             nginx-golang-postgres_backend_1
+e63be7db7cbc        postgres                        "docker-entrypoint.s…"   49 seconds ago      Up 49 seconds       5432/tcp             nginx-golang-postgres_db_1
+```
+
+After the application starts, navigate to `http://localhost:80` in your web browser to get a colorful message.
+```
+My New React App
+```
+
+The backend service container has the port 80 mapped to 8080 on the host.
+```
+$ curl localhost:8080
+Hello Docker World
+```
+
+Stop and remove the containers
+```
+$ docker-compose down
+Stopping react-express-mysql_frontend_1 ... done
+Stopping react-express-mysql_backend_1  ... done
+Stopping react-express-mysql_db_1       ... done
+Removing react-express-mysql_frontend_1 ... done
+Removing react-express-mysql_backend_1  ... done
+Removing react-express-mysql_db_1       ... done
+Removing network react-express-mysql_default
+
+```

samples/react-express-mysql/frontend/Dockerfile.production

@@ -1,12 +0,0 @@
-FROM node:10 as build
-
-RUN mkdir /project
-WORKDIR /project
-COPY . .
-RUN yarn install
-RUN yarn run package
-
-FROM nginx:1.13-alpine
-
-COPY config/nginx.conf /etc/nginx/conf.d/default.conf
-COPY --from=build /project/dist /usr/share/nginx/html