[ENHANCEMENTE]argilla-server: unify credentials for both docker images (#5324)

# Description
<!-- Please include a summary of the changes and the related issue.
Please also include relevant motivation and context. List any
dependencies that are required for this change. -->

This PR reviews and unifies the credentials setup for both docker
images. With changes on this PR, the following env variables are
available for both images:

- `USERNAME`: the owner username (Default: "")
- `PASSWORD`: the owner password (Default: "")
- `API_KEY`: the owner API KEY (Default: "")
- `REINDEX_DATASETS`: launch reindex datasets on server server startup
(Default=0)

TODO:
- [x] Add defaults in the
[`docker-compose.yaml`](https://github.com/argilla-io/argilla/pull/5315/files#diff-e7d583fa0f5bfdf69891c1714df0e8dd48be872d9c5efe1f3128b6d3d12f49a2)
file with the following values:
```yaml
  USERNAME: argilla
  PASSWORD: 12345678
  API_KEY: argilla.apikey
```
-> Done
[here](1480e16)

- [x] Add description in [the server
configuration](https://github.com/argilla-io/argilla/pull/5291/files#diff-4b8728c9f3074b2a2209fb900e51dfd3a9ad058f221c8ae244567fd8786da27dR119)

-> Done
[here](https://github.com/argilla-io/argilla/pull/5291/files#diff-4b8728c9f3074b2a2209fb900e51dfd3a9ad058f221c8ae244567fd8786da27dR115)

**Type of change**
<!-- Please delete options that are not relevant. Remember to title the
PR according to the type of change -->

- Improvement (change adding some improvement to an existing
functionality)

**How Has This Been Tested**
<!-- Please add some reference about how your feature has been tested.
-->

**Checklist**
<!-- Please go over the list and make sure you've taken everything into
account -->

- I added relevant documentation
- I followed the style guidelines of this project
- I did a self-review of my code
- I made corresponding changes to the documentation
- I confirm My changes generate no new warnings
- I have added tests that prove my fix is effective or that my feature
works
- I have added relevant notes to the CHANGELOG.md file (See
https://keepachangelog.com/)

Author: frascuchon

argilla-server/docker/argilla-hf-spaces/Dockerfile

@@ -7,7 +7,6 @@ USER root
 
 # Copy Argilla distribution files
 COPY scripts/start.sh /home/argilla
-COPY scripts/start_argilla_server.sh /home/argilla
 COPY Procfile /home/argilla
 COPY requirements.txt /packages/requirements.txt
 
@@ -52,9 +51,7 @@ USER argilla
 ENV ELASTIC_CONTAINER=true
 ENV ES_JAVA_OPTS="-Xms1g -Xmx1g"
 
-ENV USERNAME=""
-ENV PASSWORD=""
-
 ENV ARGILLA_HOME_PATH=/data/argilla
+ENV REINDEX_DATASETS=1
 
 CMD ["/bin/bash", "start.sh"]

argilla-server/docker/argilla-hf-spaces/scripts/start_argilla_server.sh

@@ -17,11 +17,12 @@ RUN apt-get update && \
 FROM python:3.10.12-slim
 
 # Environment Variables
+ENV USERNAME=""
+ENV PASSWORD=""
+ENV API_KEY=""
+## Argilla home path
 ENV ARGILLA_HOME_PATH=/var/lib/argilla
-ENV DEFAULT_USER_ENABLED=true
-ENV DEFAULT_USER_PASSWORD=1234
-ENV DEFAULT_USER_API_KEY=argilla.apikey
-ENV USERS_DB=/config/.users.yml
+## Uvicorn defaults
 ENV UVICORN_PORT=6900
 
 RUN useradd -ms /bin/bash argilla

argilla-server/docker/server/Dockerfile

@@ -4,9 +4,24 @@ set -e
 # Run database migrations
 python -m argilla_server database migrate
 
-# Create default user
-if [ "$DEFAULT_USER_ENABLED" = "true" ] || [ "$DEFAULT_USER_ENABLED" = "1" ]; then
-	python -m argilla_server database users create_default --password $DEFAULT_USER_PASSWORD --api-key $DEFAULT_USER_API_KEY
+if [ -n "$USERNAME" ] && [ -n "$PASSWORD" ]; then
+  echo "Creating owner user with username ${USERNAME}"
+  if [ -n "$API_KEY" ]; then
+    python -m argilla_server database users create \
+    --first-name "$USERNAME" \
+    --username "$USERNAME" \
+    --password "$PASSWORD" \
+    --api-key "$API_KEY" \
+    --role owner
+  else
+    python -m argilla_server database users create \
+    --first-name "$USERNAME" \
+    --username "$USERNAME" \
+    --password "$PASSWORD" \
+    --role owner
+  fi
+else
+  echo "No username and password was provided. Skipping user creation"
 fi
 
 # Reindexing data into search engine