update dockerfiles, clean up

unmaintained/nginx/README.md

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+## wonderfall/nginx
+
+![](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Nginx_logo.svg/115px-Nginx_logo.svg.png)
+
+#### What is this?
+It is nginx statically linked against LibreSSL, with the following modules embedded : ngx_brotli (Brotli compression support) and headers_more. Secured by default (no root processes, even the master one), so it should be safe to use.
+
+#### Features
+- Based on Alpine Linux Edge.
+- nginx built against **LibreSSL**.
+- nginx : Cloudfare's SPDY patch.
+- nginx : Cloudfare's dynamic TLS records patch.
+- nginx : securely built using hardening gcc flags.
+- nginx : HTTP/2 (+NPN) support.
+- nginx : Brotli compression support (and configured).
+- nginx : Headers More module.
+- nginx : no root master process.
+- nginx : AIO Threads support.
+- nginx : no unnessary modules (except fastcgi).
+- nginx : pcre-jit enabled.
+- nginx : optimized configuration.
+- ngxpasswd : generates a htpasswd file easily.
+- ngxproxy : generates a *proxy vhost* after asking you a few questions.
+
+#### Notes
+It is required to chown your certs files with the right uid/pid and change the `listen` directive to 8000/4430 instead of 80/443. Linux 3.17+, and the latest Docker stable are recommended.
+
+#### Volumes
+- **/sites-enabled** : vhosts files (*.conf)
+- **/conf.d** : additional configuration files
+- **/certs** : SSL/TLS certificates
+- **/var/log/nginx** : nginx logs
+- **/passwds** : authentication files
+- **/www** : put your websites there
+
+#### Build-time variables
+- **NGINX_VERSION** : version of nginx
+- **LIBRESSL_VERSION** : version of LibreSSL
+- **GPG_NGINX** : fingerprint of signing key package
+- **GPG_LIBRESSL** : fingerprint of signing key package
+- **BUILD_CORES** : number of cores you'd like to build with (default : all)
+
+#### Environment variables
+- **GID** : nginx group id *(default : 991)*
+- **UID** : nginx user id *(default : 991)*
+
+#### How to use it?
+https://github.com/hardware/mailserver/wiki/Reverse-proxy-configuration
+
+You can use `ngxproxy` to generate a *vhost* through an easy process : `docker exec -ti nginx ngxproxy`. `ngxpasswd` can generate htpasswd files : `docker exec -ti nginx ngxpasswd`. Both utilites are interactive so you won't feel lost.
+
+Some configuration files located in `/etc/nginx/conf` are already provided, you can use them with the `include` directive.
+
+- `ssl_params` : Provides a nice balance between compatibility and security.
+- `headers_params` : HSTS (+ preload), XSS protection, etc.
+- `proxy_params` : use with `proxy_pass`.