Add the example code

Author: shvetsovdm

.gitignore

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+.DS_Store

docker-compose.yml

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+version: '3'
+
+services:
+  nginx-proxy:
+    image: jwilder/nginx-proxy
+    ports:
+      - 8080:80
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+
+  weba:
+    build:
+      context: web/a
+    expose:
+      - 8081
+    environment:
+      - VIRTUAL_HOST=a.localhost
+    depends_on:
+      - nginx-proxy
+  webb:
+    build:
+      context: web/b
+    expose:
+      - 8082
+    environment:
+      - VIRTUAL_HOST=b.localhost
+    depends_on:
+      - nginx-proxy
+  webc:
+    build:
+      context: web/generic
+    expose:
+      - 8080
+    environment:
+      - VIRTUAL_HOST=c.localhost
+      - WEB_MESSAGE=Web C from generic
+      - WEB_NAME=D
+      - WEB_PORT=8080
+    depends_on:
+      - nginx-proxy
+  webd:
+    build:
+      context: web/generic
+    expose:
+      - 8080
+    environment:
+      - VIRTUAL_HOST=d.localhost
+      - WEB_MESSAGE=Web D from generic
+      - WEB_NAME=D
+      - WEB_PORT=8080
+    depends_on:
+      - nginx-proxy

readme.md

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+# Docker nginx-proxy example
+
+nginx-proxy sets up a container running nginx and docker-gen. docker-gen generates reverse proxy configs for nginx and reloads nginx when containers are started and stopped.
+
+See Automated Nginx Reverse Proxy for Docker for why you might want to use this.
+
+[source](https://github.com/jwilder/nginx-proxy)
+
+## Run
+
+In order to run example execute in root of the cloned repo:
+
+    $ docker-compose up
+
+It will run 4 node.js HTTP servers [a.localhost:8080](http://a.localhost:8080), [b.localhost:8080](http://b.localhost:8080), [c.localhost:8080](http://c.localhost:8080), [d.localhost:8080](http://d.localhost:8080). The servers responds with plain text.

web/a/Dockerfile

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+FROM mhart/alpine-node:8.11
+
+WORKDIR /app
+COPY /app .
+
+EXPOSE 8081
+
+CMD ["node", "index.js"]

web/a/app/index.js

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+const http = require('http');
+
+function requestHandler(req, res) {
+  res.end('Web A');
+}
+
+const httpServer = http.createServer((req, res) => requestHandler(req, res));
+httpServer.listen(8081, () => console.log('Web A is running on 8081'));

web/b/Dockerfile

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+FROM mhart/alpine-node:8.11
+
+COPY app .
+
+CMD ["node", "index.js"]

web/b/app/index.js

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+const http = require('http');
+
+function requestHandler(req, res) {
+  res.end('Web B');
+}
+
+const httpServer = http.createServer((req, res) => requestHandler(req, res));
+httpServer.listen(8082, () => console.log('Web B is runnong on 8082'));

web/generic/Dockerfile

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+FROM mhart/alpine-node:8.11
+
+WORKDIR /app
+
+COPY app .
+
+CMD ["node", "index.js"]

web/generic/app/index.js

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+const http = require('http');
+const msg = process.env.WEB_MESSAGE;
+const name = process.env.WEB_NAME;
+const port = process.env.WEB_PORT;
+
+function requestHandler(req, res) {
+  res.end(msg);
+}
+
+const httpServer = http.createServer((req, res) => requestHandler(req, res));
+httpServer.listen(port, () => console.log(`Web ${name} is running on ${port}`));