include TRANSLATIONS_DIR as environment variable in the Docker image

Dockerfile

-FROM python:3.11
+FROM python:3.11-alpine
+WORKDIR /app
 
 ARG ARTIFACT_VERSION
 
+RUN apk add --no-cache gcc libc-dev libffi-dev && \
+    addgroup -S appgroup && adduser -S appuser -G appgroup -h /app
+
 RUN pip install \
     --pre \
     --extra-index-url https://artifactory.software.geant.org/artifactory/api/pypi/geant-swd-pypi/simple \
+    --target /app \
     geant-service-orchestrator==${ARTIFACT_VERSION}
 
-# Create the directory for the configuration and copy the example config into it
-# NOTE: a real config must be mounted at /etc/gso/config.json when running the container
-RUN mkdir -p /etc/gso
-COPY gso/oss-params-example.json /etc/gso/config.json
-
-# Expose port 8080 for the FastAPI application
-EXPOSE 8080
+# Set the environment variable for the translations directory
+ENV TRANSLATIONS_DIR=/app/gso/translations/
 
-# The app reads the configuration from this location.
-# No need to set environment variables in your docker-compose.
-ENV OSS_PARAMS_FILENAME=/etc/gso/config.json
+COPY --chmod=755 entrypoint.sh /app/entrypoint.sh
 
-# Start the FastAPI application
-CMD ["uvicorn", "gso.main:app", "--host", "0.0.0.0", "--port", "8080"]
+RUN chown -R appuser:appgroup /app
+USER appuser
+EXPOSE 8080
+ENTRYPOINT ["/app/entrypoint.sh"]