diff --git a/conf/systemd.service b/conf/systemd.service
index b73e479..541af5e 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -7,14 +7,8 @@ Type=simple
 User=__APP__
 Group=__APP__
 
-Environment="APP_BASE_URL=https://__DOMAIN__"
-Environment="APP_PORT=__PORT__"
-Environment="DB_CLIENT=pg"
-Environment="POSTGRES_PASSWORD=__DB_PWD__"
-Environment="POSTGRES_DATABASE=__DB_NAME__"
-Environment="POSTGRES_USER=__DB_USER__"
-Environment="POSTGRES_PORT=5432"
-Environment="POSTGRES_HOST=localhost"
+Environment="__YNH_NODE_LOAD_PATH__"
+EnvironmentFile=__INSTALL_DIR__/.env
 
 WorkingDirectory=__INSTALL_DIR__/
 ExecStart=/usr/bin/yarn __INSTALL_DIR__/packages/server start
diff --git a/doc/POST_INSTALL.md b/doc/POST_INSTALL.md
index 8601988..f3db3c7 100644
--- a/doc/POST_INSTALL.md
+++ b/doc/POST_INSTALL.md
@@ -1,4 +1,8 @@
-Default credentials:
+Now login to Joplin
+ - Url: https://__DOMAIN____PATH__
+ - Email: __ADMIN_MAIL__
+ - Password: __ADMIN_PASS__
 
-Email: admin@localhost
-Password: admin
\ No newline at end of file
+Then you may change the default password at this page: https://__DOMAIN____PATH__/admin/users
+
+Then download one of these Joplin apps and configure the synchronisation with your server: https://joplinapp.org/help/install/
diff --git a/manifest.toml b/manifest.toml
index feea726..223996d 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -38,6 +38,9 @@ ram.runtime = "50M"
     type = "group"
     default = "visitors"
 
+    [install.admin]
+    type = "user"
+
 [resources]
 
     [resources.sources]
@@ -63,7 +66,7 @@ ram.runtime = "50M"
     main.default = 22300
 
     [resources.apt]
-    packages = "postgresql, postgresql-client"
+    packages = "postgresql, postgresql-client, python3-bcrypt"
     extras.yarn.repo = "deb https://dl.yarnpkg.com/debian/ stable main"
     extras.yarn.key = "https://dl.yarnpkg.com/debian/pubkey.gpg"
     extras.yarn.packages = "yarn"
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 9195d57..c661840 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -10,6 +10,11 @@ nodejs_version=18
 # PERSONAL HELPERS
 #=================================================
 
+function bcrypt_password() {
+  echo -n "$1" | \
+    python3 -c "import bcrypt; import sys; print(bcrypt.hashpw(bytes(sys.stdin.read(), 'ascii'), bcrypt.gensalt(rounds=10)).decode('ascii'))"
+}
+
 #=================================================
 # EXPERIMENTAL HELPERS
 #=================================================
diff --git a/scripts/backup b/scripts/backup
index 59c90ce..f11e868 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -34,7 +34,7 @@ ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 ynh_backup --src_path="/etc/systemd/system/$app.service"
 
 #=================================================
-# BACKUP THE MYSQL DATABASE
+# BACKUP THE PostgreSQL DATABASE
 #=================================================
 ynh_print_info --message="Backing up the PostgreSQL database..."
 
diff --git a/scripts/change_url b/scripts/change_url
index ecb9a84..4f8a5e1 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -25,8 +25,12 @@ ynh_script_progression --message="Updating NGINX web server configuration..." --
 
 ynh_change_url_nginx_config
 
+ynh_use_nodejs
+
 ynh_add_systemd_config
 
+ynh_add_config --template=".env" --destination="$install_dir/.env"
+
 #=================================================
 # GENERIC FINALISATION
 #=================================================
diff --git a/scripts/install b/scripts/install
index 2a06a84..4e03f33 100755
--- a/scripts/install
+++ b/scripts/install
@@ -9,6 +9,14 @@
 source _common.sh
 source /usr/share/yunohost/helpers
 
+admin_pass=$(ynh_string_random --length=24)
+admin_mail=$(ynh_user_get_info --username=$admin --key="mail")
+admin_name=$(ynh_user_get_info --username=$admin --key="fullname")
+
+# Store these values even if we don't need them, so they are printed in the post-install message
+ynh_app_setting_set --app=$app --key=admin_pass --value=$admin_pass
+ynh_app_setting_set --app=$app --key=admin_mail --value=$admin_mail
+
 #=================================================
 # INSTALL DEPENDENCIES
 #=================================================
@@ -57,11 +65,12 @@ chown $app:$app "$install_dir/.env"
 #=================================================
 # INSTALL JOPLIN
 #=================================================
-ynh_script_progression --message="Installing $app..." --weight=10
+ynh_script_progression --message="Building $app..." --weight=10
 
-pushd $install_dir
+pushd $install_dir/packages/server
  	ynh_use_nodejs
 	sudo -u $app env $ynh_node_load_PATH BUILD_SEQUENCIAL=1 yarn install --inline-builds
+	sudo -u $app env $ynh_node_load_PATH yarn build
 	sudo -u $app env $ynh_node_load_PATH yarn cache clean
 	ynh_secure_remove .yarn/berry
 popd
@@ -74,7 +83,20 @@ popd
 ynh_script_progression --message="Starting a systemd service..." --weight=1
 
 # Start a systemd service
-ynh_systemd_action --service_name=$app --action="start" --log_path="systemd"
+ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Starting services..."
+
+#=================================================
+# CHANGING DEFAULT ADMIN PASSWORD
+#=================================================
+ynh_script_progression --message="Changing default admin password..." --weight=1
+
+hashed_pwd=$(bcrypt_password "$admin_pass")
+
+ynh_psql_connect_as --user="$db_user" --password="$db_pwd" --database="$db_name" <<< "
+  UPDATE users
+  SET password='$hashed_pwd', email='$admin_mail', full_name='$admin_name'
+  WHERE email='admin@localhost'
+"
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/restore b/scripts/restore
index e89b8f0..c9b4674 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -20,7 +20,7 @@ ynh_restore_file --origin_path="$install_dir"
 chown -R $app:www-data "$install_dir"
 
 #=================================================
-# RESTORE THE MYSQL DATABASE
+# RESTORE THE PostgreSQL DATABASE
 #=================================================
 ynh_script_progression --message="Restoring the PostgreSQL database..." --weight=1
 
diff --git a/scripts/upgrade b/scripts/upgrade
index c95d7e8..57185a6 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -42,6 +42,22 @@ ynh_script_progression --message="Upgrading dependencies..." --weight=5
 # Install Nodejs
 ynh_exec_warn_less ynh_install_nodejs --nodejs_version=$nodejs_version
 
+#=================================================
+# BUILD
+#=================================================
+
+if [ "$upgrade_type" == "UPGRADE_APP" ]
+then
+  ynh_script_progression --message="Building $app..." --weight=10
+  pushd $install_dir/packages/server
+    ynh_use_nodejs
+    sudo -u $app env $ynh_node_load_PATH BUILD_SEQUENCIAL=1 yarn install --inline-builds
+    sudo -u $app env $ynh_node_load_PATH yarn build
+    sudo -u $app env $ynh_node_load_PATH yarn cache clean
+    ynh_secure_remove .yarn/berry
+  popd
+fi
+
 #=================================================
 # REAPPLY SYSTEM CONFIGURATIONS
 #=================================================