- update to nginx 1.23.1
- extract build args into .env file
- add gitignore for ssl keys
- update readme
  - update usage
  - add container image structure tree
  - add requirements section
  - add "How is this container image that small?" section
- update default nginx.conf
- add default http vHost to reject all requests that don't match a vHost
- update tests / localhost vHost
  - listen on localhost v4 and v6 explicitly
  - set expires to 0, to prevent client caching of testing responses
  - update localhosts test response:
    - return dynamic data on requesting "/" instead of static file
    - add brotli and gzip pre-compressed satic test html files
- add docker-compose.yml (for easy building and running this project)
- add shell entrypoint script module structure to perform startup tasks
- add entrypoint module to perform envsubst on all nginx conf files
- run nginx as unpriviged user inside container
- remove nginx http_perl module
- remove nginx http_xslt module
- remove nginx http_image_filter module
- add nginx njs module

Run apt-get update

Fixes

Err:1 http://azure.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libnss3-tools amd64 2:3.49.1-1ubuntu1.6
  404  Not Found [IP: 40.81.13.82 80]
E: Failed to fetch http://azure.archive.ubuntu.com/ubuntu/pool/universe/n/nss/libnss3-tools_3.49.1-1ubuntu1.6_amd64.deb  404  Not Found [IP: 40.81.13.82 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

Bump docker/build-push-action from 2 to 3

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 2 to 3.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](https://github.com/docker/build-push-action/compare/v2...v3

)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Bump actions/checkout from 2 to 3

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...v3

)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

See https://hg.nginx.org/nginx-quic/rev/651cc905b7c2

HTTP/3: $http3 variable.

A new variable $http3 is added.  The variable equals to "h3" for HTTP/3
connections, "hq" for hq connections and is an empty string otherwise.

The variable $quic is eliminated.

The new variable is similar to $http2 variable.

GeoIP2 not working - libmaxminddb missing

nginx: [emerg] dlopen() "/etc/nginx/modules/ngx_http_geoip2_module.so" failed (Error loading shared library libmaxminddb.so.0: No such file or directory (needed by /etc/nginx/modules/ngx_http_geoip2_module.so)) in /etc/nginx/main.d/modules.conf:2

nginx 1.21.6

Bump BoringSSL too

nginx 1.21.5

    The value of $http3 is "h3" for HTTP/3 connections,
    "hq" for hq connections, or an empty string otherwise.

See https://quic.nginx.org/README:

    In http, an additional variable is available: $http3.
    The value of $http3 is "h3" for HTTP/3 connections,
    "hq" for hq connections, or an empty string otherwise.

Prevent the following from being reported:

nginx: [emerg] unknown "quic" variable

http://nginx.org/en/CHANGES

Changes with nginx 1.21.5                                        28 Dec 2021

    *) Change: now nginx is built with the PCRE2 library by default.

    *) Change: now nginx always uses sendfile(SF_NODISKIO) on FreeBSD.

    *) Feature: support for sendfile(SF_NOCACHE) on FreeBSD.

    *) Feature: the $ssl_curve variable.

    *) Bugfix: connections might hang when using HTTP/2 without SSL with the
       "sendfile" and "aio" directives.

Mention ngx_http_geoip2_module (#68)

Add GeoIP2

nginx 1.21.4 + the latest BoringSSL changes

https://hg.nginx.org/nginx-quic/rev/61d0fa67b55e

Bump macbre/push-to-ghcr from 7 to 8

Bumps [macbre/push-to-ghcr](https://github.com/macbre/push-to-ghcr) from 7 to 8.
- [Release notes](https://github.com/macbre/push-to-ghcr/releases)
- [Commits](https://github.com/macbre/push-to-ghcr/compare/v7...v8

)

---
updated-dependencies:
- dependency-name: macbre/push-to-ghcr
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>