chore: rename default branch master -> main

.github/workflows/dockerhub.yml

@@ -4,7 +4,7 @@ on:
   workflow_dispatch:
   push:
     branches:
-      - master
+      - main
     tags:
       - '*.*.*'
     paths-ignore:

README.md

@@ -1,5 +1,5 @@
 ![latest 0.8.0](https://img.shields.io/badge/latest-0.8.0-green.svg?style=flat)
-![nginx 1.19.3](https://img.shields.io/badge/nginx-1.19.3-brightgreen.svg) ![License MIT](https://img.shields.io/badge/license-MIT-blue.svg) [![Build Status](https://travis-ci.org/jwilder/nginx-proxy.svg?branch=master)](https://travis-ci.org/jwilder/nginx-proxy) [![](https://img.shields.io/docker/stars/jwilder/nginx-proxy.svg)](https://hub.docker.com/r/nginxproxy/nginx-proxy 'DockerHub') [![](https://img.shields.io/docker/pulls/jwilder/nginx-proxy.svg)](https://hub.docker.com/r/nginxproxy/nginx-proxy 'DockerHub')
+![nginx 1.19.3](https://img.shields.io/badge/nginx-1.19.3-brightgreen.svg) ![License MIT](https://img.shields.io/badge/license-MIT-blue.svg) [![Build Status](https://travis-ci.org/jwilder/nginx-proxy.svg?branch=main)](https://travis-ci.org/jwilder/nginx-proxy) [![](https://img.shields.io/docker/stars/jwilder/nginx-proxy.svg)](https://hub.docker.com/r/nginxproxy/nginx-proxy 'DockerHub') [![](https://img.shields.io/docker/pulls/jwilder/nginx-proxy.svg)](https://hub.docker.com/r/nginxproxy/nginx-proxy 'DockerHub')
 
 
 nginx-proxy sets up a container running nginx and [docker-gen][1].  docker-gen generates reverse proxy configs for nginx and reloads nginx when containers are started and stopped.
@@ -166,7 +166,7 @@ $ curl -H "Host: whoami.local" localhost
 I'm 5b129ab83266
 ```
 
-To run nginx proxy as a separate container you'll need to have [nginx.tmpl](https://github.com/nginx-proxy/nginx-proxy/blob/master/nginx.tmpl) on your host system.
+To run nginx proxy as a separate container you'll need to have [nginx.tmpl](https://github.com/nginx-proxy/nginx-proxy/blob/main/nginx.tmpl) on your host system.
 
 First start nginx with a volume: