nginx-nodejs-redis: add dev envs config

* Add Docker Desktop Development Environments config
* Upgrade NodeJS image
* Rename `nginx` to `proxy` and use bind mount for config
  for consistency with other examples

Signed-off-by: Milas Bowman <milas.bowman@docker.com>

nginx-nodejs-redis/.docker/docker-compose.yaml

@@ -0,0 +1,47 @@
+services:
+  redis:
+    image: 'redislabs/redismod'
+    ports:
+      - '6379:6379'
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+  web1:
+    build:
+      context: web
+      target: dev-envs
+    restart: on-failure
+    hostname: web1
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    depends_on:
+      redis:
+        condition: service_healthy
+
+  web2:
+    build:
+      context: web
+      target: dev-envs
+    restart: on-failure
+    hostname: web2
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    depends_on:
+      redis:
+        condition: service_healthy
+
+  proxy:
+    image: nginx
+    volumes:
+      - type: bind
+        source: ./proxy/nginx.conf
+        target: /etc/nginx/conf.d/default.conf
+        read_only: true
+    ports:
+      - '80:80'
+    depends_on:
+    - web1
+    - web2