diff --git a/cntmanage/docker/build.sh b/cntmanage/docker/build.sh
new file mode 100755
index 0000000..acd9c88
--- /dev/null
+++ b/cntmanage/docker/build.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+GIT_HASH=$(git rev-parse --short HEAD)
+echo "Building Flightslot version ${GIT_HASH}"
+docker compose build --build-arg GIT_HASH=${GIT_HASH}
diff --git a/cntmanage/docker/docker-compose.yml b/cntmanage/docker/docker-compose.yml
index 6a1fd0b..2dc0d18 100644
--- a/cntmanage/docker/docker-compose.yml
+++ b/cntmanage/docker/docker-compose.yml
@@ -22,6 +22,8 @@ services:
     build: 
       context: ..
       dockerfile: ./docker/flightslot.Dockerfile
+      args:
+        GIT_HASH:
     image: flightslot:latest
     container_name: tech-flightslot
     restart: unless-stopped
diff --git a/cntmanage/docker/entrypoint.sh b/cntmanage/docker/entrypoint.sh
index 8491eef..ff3a37f 100755
--- a/cntmanage/docker/entrypoint.sh
+++ b/cntmanage/docker/entrypoint.sh
@@ -23,5 +23,5 @@ else
     echo "👁️ Superuser ${DJANGO_SUPERUSER_USERNAME} created successfully ..."
 fi
 
-echo "🚀 Launching Flightslot..."
+echo "🚀 Launching Flightslot version ${VERSION} ..."
 exec "$@"
diff --git a/cntmanage/docker/flightslot.Dockerfile b/cntmanage/docker/flightslot.Dockerfile
index a5c3a90..7fea967 100644
--- a/cntmanage/docker/flightslot.Dockerfile
+++ b/cntmanage/docker/flightslot.Dockerfile
@@ -4,7 +4,6 @@ FROM python:3.12 AS builder
 # Install Poetry
 RUN curl -sSL https://install.python-poetry.org | python3 -
 ENV PATH="${PATH}:/root/.local/bin"
-RUN env
 # Create build directory
 WORKDIR /build
 # Copy project files
@@ -14,28 +13,26 @@ RUN poetry update --no-interaction --no-ansi
 # Build project
 RUN poetry build
 
-### STAGE 2 — Final image
+### STAGE 2 — Final image ###
 FROM python:3.12-slim AS deploy
-
+# Create app run directory
 WORKDIR /app
-
 # Copy application custom static files
 RUN mkdir -p static
 COPY ./static/cantorair.jpg ./static
 COPY ./static/cantorair_blue.jpg ./static
-
 # Copy application custom templates for admin page
 RUN mkdir -p /templates/admin
 COPY ./templates/admin/* ./templates/admin/
-
 # Copy and install application wheel package
 COPY --from=builder /build/dist/*.whl ./
 RUN pip install --no-cache-dir *.whl
 RUN pip install gunicorn whitenoise
-
 # Copy entryupoint bash script
 COPY ./docker/entrypoint.sh ./
+# Collect build number from build arg
+ARG GIT_HASH
+ENV VERSION=${GIT_HASH}
 ENTRYPOINT ["/app/entrypoint.sh"]
-
 # Command to be executed after entry point 
 CMD ["gunicorn", "cntmanage.wsgi:application", "--bind", "0.0.0.0:8000", "--timeout", "600"]
diff --git a/cntmanage/flightslot/admin.py b/cntmanage/flightslot/admin.py
index c42ebce..af1f613 100644
--- a/cntmanage/flightslot/admin.py
+++ b/cntmanage/flightslot/admin.py
@@ -15,6 +15,9 @@ from .admins.weekpref_adm import WeekPreferenceAdmin
 
 from django.contrib.admin import AdminSite
 
+from os import environ
+
+# User website under /user/ URL
 class FlightSlotUserSite(AdminSite):
     site_header = "Flight Scheduler 🛫"
     site_title = "Flight Scheduler 🛫"
@@ -28,13 +31,16 @@ class FlightSlotUserSite(AdminSite):
         
         return app_list
 
+# Register only user visible models
 flightslot_user = FlightSlotUserSite(name="user_site")
-
-# registra SOLO i modelli autorizzati
 flightslot_user.register(WeekPreference, WeekPreferenceAdmin)
 
-admin.site.site_header = "Flight Scheduler Admin 🛫"
-admin.site.site_title = "Flight Scheduler Admin 🛫"
+
+# Get version for debug purposes
+ver: str = environ.get("VERSION", "dev")
+# Register all  visible models
+admin.site.site_header = f"Flight Scheduler Admin 🛫 - ver.{ver}"
+admin.site.site_title = f"Flight Scheduler Admin 🛫 - ver.{ver}"
 admin.site.index_title = "Welcome to CantorAir Flight Scheduler Administrator Portal"
 
 admin.site.register(Aircraft, AircraftAdmin)
diff --git a/cntmanage/flightslot/admins/mission_adm.py b/cntmanage/flightslot/admins/mission_adm.py
index b707a7e..9932f43 100644
--- a/cntmanage/flightslot/admins/mission_adm.py
+++ b/cntmanage/flightslot/admins/mission_adm.py
@@ -1,4 +1,4 @@
-from django.forms import ModelChoiceField, TypedMultipleChoiceField, ModelMultipleChoiceField
+from django.forms import ModelMultipleChoiceField
 from django.contrib import admin, messages
 from django.http import HttpRequest
 from django.db.models.query import QuerySet, Q