Update nginx-proxy to latest upstream, support multiple architectures

[dustinrue]

Description of the Change

• Updated to use latest upstream proxy version
• Updated certs to satisfy requirements of updated upstream version
• Can be built for multiple architectures (see readme)

Alternate Designs

Benefits

Possible Drawbacks

Verification Process

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Applicable Issues

Changelog Entry

[dustinrue]

This PR would close #21

[eugene-manuilov]

@dustinrue jwilder/nginx-proxy also supports arm based systems now:

Looks like we don't need to switch to nginxproxy/nginx-proxy anymore, do we? We just need to update the tag of the jwilder/nginx-proxy image. I think we can even update it to the alpine tag which is 3 times smaller than the latest one. What do you think?

Suggested change

	FROM nginxproxy/nginx-proxy:latest
	FROM jwilder/nginx-proxy:alpine