Fix compose file

[GraphicHealer]

I had to edit the compose file to fix an issue of Traefik not allowing me to access the webpage from another machine.
I would get a 404 Page Not Found error uintill i did the fix below.

1. Replace all instances of papermerge.local with ${HOSTNAME} in docker-compose.yml
2. add HOSTNAME=<hostname of PC> to .env

[GraphicHealer]

You know, I just had the thought to instead of make it a .env value, to get the hostname from the PC itself. That might be easier.

[ciur]

@gljones2001 I would gladly accept your pull request with above mentioned enhancement

[GraphicHealer]

oh. I didn't have a pull request. I just manually fixed it by using the web editor in Portainer.

[GraphicHealer]

Honestly it was such a simple edit I thought you could just do it through the github web editor. I didn't want to do a whole pull request just for like 2 lines of code.

[GraphicHealer]

There are the places I changed it.

[GraphicHealer]

Awesome dude. Thanks. I'll try it out.

[GraphicHealer]

Hey, you might want to update the setup page in the docs.
https://docs.papermerge.io/Installation/docker.html

and the portainer page.

[GraphicHealer]

Also, Noticed a descrepicy in the .env on the readme.

APP_IMAGE=ghcr.io/papermerge/papermerge
APP_TAG=latest
PAPERMERGE_JS_IMAGE=ghcr.io/papermerge/papermerge.js
PAPERMERGE_JS_TAG=latest

HOSTNAME=docman

DB_USER=postgres
DB_NAME=postgres
DB_PASSWORD=postgres
DB_HOST=db
DB_PORT=5432

REDIS_HOST=redis
REDIS_PORT=6379

ES_HOSTS=es
ES_PORT=9200

SECRET_KEY=alsdkalsdjlaksdj90823423!KLKJLkjkjlkjlKLPOgrwqna

SUPERUSER_USERNAME=admin
SUPERUSER_EMAIL=admin@mail.com
SUPERUSER_PASSWORD=password

Notice the ghcr.io/ that is not on the readme.

[ciur]

good catch