chore: update documentation

Signed-off-by: Vitor Mattos <vitor@php.rio>

Author: vitormattos

README.md

@@ -1,3 +1,61 @@
-# documentation
+# Official documentation
 
 Read https://github.com/nginx-proxy/nginx-proxy and https://github.com/nginx-proxy/docker-letsencrypt-nginx-proxy-companion/
+
+## What is it for
+
+Docker environments where all services are on a single host machine. Managed based on environment variables in each service for proxy configuration.
+
+## Installation
+
+* Clone the repo https://github.com/LibreCodeCoop/nginx-proxy/ in `~/projects`
+```bash
+git clone https://github.com/LibreCodeCoop/nginx-proxy ~/projects/nginx-proxy
+```
+* Launch the application
+```bash
+cd ~/projects/nginx-proxy
+docker compose up -d
+```
+
+## Backup
+* You only need to back up the volumes because they contain the SSL certificates of the subdomains
+
+## Update
+
+* Go to the nginx-proxy folder which should be in `~/projects/nginx-proxy`
+* Run the `git status` command to see if there were any changes, evaluate if you can discard or if you need to save the change if there were any
+* Update the main project
+```bash
+git pull origin master
+```
+* Update the images
+```bash
+docker compose pull
+```
+* Raise the containers
+```bash
+docker compose up -d
+```
+
+## Service setup
+
+A service setup may require specific configurations, for example if the service runs on a different port or has a different protocol. In these cases, see the nginx-proxy documentation.
+
+### In subdomains
+* You will need to add at least these environments to the server:
+```bash
+VIRTUAL_HOST=
+LETSENCRYPT_HOST=
+LETSENCRYPT_EMAIL=
+```
+### In subdomains and paths
+* https://github.com/nginx-proxy/nginx-proxy/tree/main/docs#path-based-routing
+* You will almost certainly need this:
+* https://github.com/nginx-proxy/nginx-proxy/tree/main/docs#per-virtual_host-location-configuration\
+Required:\
+For pgadmin to work on the /pgadmin path you will need to add these rules to nginx:
+```nginx
+proxy_set_header X-Script-Name /pgadmin;
+proxy_set_header Host $host;
+```