docs: upd docs, fix version, rm docker composer version (#11175)

### What
- Update docs for how-to-develop-using-docker
- Remove version in docker files, this is obsolete now, and print a
warning
- Fix "make info"

### Related issue(s) and discussion
- Fixes #-none-

Makefile

@@ -10,6 +10,7 @@ SHELL := $(shell which bash)
 # some vars
 ENV_FILE ?= .env
 NAME = "ProductOpener"
+VERSION = $(shell cat version.txt)
 MOUNT_POINT ?= /mnt
 DOCKER_LOCAL_DATA_DEFAULT = /srv/off/docker_data
 DOCKER_LOCAL_DATA ?= $(DOCKER_LOCAL_DATA_DEFAULT)
@@ -85,7 +86,7 @@ _FORCE:
 # Info #
 #------#
 info:
-	@echo "${NAME} version: ${VERSION}"
+	@echo "${NAME} version: v${VERSION}"
 
 usage:
 	@echo "🥫 Welcome to the Open Food Facts project"

docker-compose.yml

@@ -1,6 +1,4 @@
-version: "3.7"
-
-x-backend-conf: &backend-conf
+x-backend-conf: &backend-conf
   image: ghcr.io/openfoodfacts/openfoodfacts-server/backend:${TAG}
   environment:
     - PRODUCERS_PLATFORM

docker/admin-uis.yml

@@ -1,5 +1,4 @@
-version: "3.7"
-services:
+services:
   mongoku:
     image: huggingface/mongoku:1.3.0
     depends_on:

docker/dev.yml

@@ -1,6 +1,4 @@
-version: "3.7"
-
-x-backend-conf: &backend-conf
+x-backend-conf: &backend-conf
   image: openfoodfacts-server/backend:dev
   build:
     context: .

docker/devcontainer.yml

@@ -1,4 +1,3 @@
-version: "3.7"
 services:
   backend:
     build:

docker/geolite2.yml

@@ -1,5 +1,4 @@
-version: "3.7"
-services:
+services:
   backend:
     volumes:
       - geolite2:/usr/local/share/GeoLite2-Country

docker/jslint.yml

@@ -1,6 +1,4 @@
-version: "3.7"
-
-# Some tweaks to be able to run npm run lint
+# Some tweaks to be able to run npm run lint
 services:
   dynamicfront:
     command: ["npm", "run", "lint"]

docker/monitor.yml

@@ -1,4 +1,3 @@
-version: "3.7"
 services:
   apache_exporter:
     image: solsson/prometheus-exporter-apache:latest

docker/perldb.yml

@@ -1,4 +1,3 @@
-version: "3.7"
 services:
   backend:
     image: productopener-backend-perldb

docker/prod.yml

@@ -1,4 +1,3 @@
-version: "3.7"
 services:
   memcached:
     restart: always

docs/dev/how-to-develop-using-docker.md

@@ -229,11 +229,7 @@ You will need:
   * `.env.opff`: configuration for Open Ped Food Facts dev env.
 
 
-* `COMPOSE_PROJECT_NAME` set to different values in each `.env` file, so that container names across deployments are unique.
-
-* `FRONTEND_PORT` and `MONGODB_PORT` 
-  set to different values in each `.env` file, 
-  so that frontend containers don't port-conflict with each other.
+* `COMPOSE_PROJECT_NAME`, `COMPOSE_PROFILES`,  `PRODUCT_OPENER_DOMAIN`, `PRODUCT_OPENER_PORT`, `PRODUCT_OPENER_FLAVOR` and `PRODUCT_OPENER_FLAVOR_SHORT` set to different values in each `.env` file, so that container names across deployments are unique and frontend containers don't port-conflict with each other. See example below.
 
 To switch between configurations, set `ENV_FILE` before running `make` commands,
 (or `docker compose` command):
@@ -281,3 +277,28 @@ A good strategy is to have multiple terminals open, one for each deployment:
   ```
 
 **Note:** the above case of 4 deployments is ***a bit ambitious***, since ProductOpener's `backend` container takes about ~6GB of RAM to run, meaning that the above 4 deployments would require a total of 24GB of RAM available.
+
+**Example:** if you already have Open Food Facts up and running and you would like to have Open Beauty Facts as well. Then, copy `.env` to `.env.obf` and modify the following variables:
+```
+COMPOSE_PROJECT_NAME=po_off
+COMPOSE_PROFILES=off
+PRODUCT_OPENER_DOMAIN=openfoodfacts.localhost
+PRODUCT_OPENER_PORT=80
+PRODUCT_OPENER_FLAVOR=openfoodfacts
+PRODUCT_OPENER_FLAVOR_SHORT=off
+```
+to
+```
+COMPOSE_PROJECT_NAME=po_obf
+COMPOSE_PROFILES=obf
+PRODUCT_OPENER_DOMAIN=openbeautyfacts.localhost
+PRODUCT_OPENER_PORT=81
+PRODUCT_OPENER_FLAVOR=openbeautyfacts
+PRODUCT_OPENER_FLAVOR_SHORT=obf
+```
+Run:
+```
+export ENV_FILE=.env.obf
+make dev
+```
+If you have error like `Errors in the labels taxonomy definition at /opt/product-opener/lib/ProductOpener/Tags.pm line 1622.`, due to conflict between taxonomies, a small hack is to comment the lines (it appears 2 times in the file) raising error in the **Tags.pm** file.