awesome-compose/nginx-golang/README.md

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## Compose sample application
### Use with Docker Development Environments
You can open this sample in the Dev Environments feature of Docker Desktop version 4.12 or later.
[Open in Docker Dev Environments <img src="../open_in_new.svg" alt="Open in Docker Dev Environments" align="top"/>](https://open.docker.com/dashboard/dev-envs?url=https://github.com/docker/awesome-compose/tree/master/nginx-golang)
### NGINX proxy with Go backend
Project structure:
```
.
├── backend
│   ├── Dockerfile
│   └── main.go
├── compose.yaml
├── proxy
│   └── nginx.conf
└── README.md
```
[`compose.yaml`](compose.yaml)
```
services:
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:
- backend
backend:
build:
context: backend
target: builder
```
The compose file defines an application with two services `proxy` and `backend`.
When deploying the application, docker compose maps port 80 of the frontend service container to the same port of the host as specified in the file.
Make sure port 80 on the host is not already in use.
## Deploy with docker compose
```
$ docker compose up -d
Creating network "nginx-golang_default" with the default driver
Building backend
Step 1/7 : FROM golang:1.13 AS build
1.13: Pulling from library/golang
...
Successfully built 4b24f27138cc
Successfully tagged nginx-golang_proxy:latest
Creating nginx-golang_backend_1 ... done
Creating nginx-golang_proxy_1 ... done
```
## Expected result
Listing containers must show two containers running and the port mapping as below:
```
$ docker compose ps
NAME COMMAND SERVICE STATUS PORTS
nginx-golang-backend-1 "/code/bin/backend" backend running
nginx-golang-proxy-1 "/docker-entrypoint.…" proxy running 0.0.0.0:80->80/tcp
```
After the application starts, navigate to `http://localhost:80` in your web browser or run:
```
$ curl localhost:80
## .
## ## ## ==
## ## ## ## ## ===
/"""""""""""""""""\___/ ===
{ / ===-
\______ O __/
\ \ __/
\____\_______/
Hello from Docker!
```
Stop and remove the containers
```
$ docker compose down
```