diff --git a/conf/.env b/conf/.env
index 04f60c3..b472618 100644
--- a/conf/.env
+++ b/conf/.env
@@ -1,3 +1,17 @@
 MIX_ENV=prod
 FLAVOUR=classic
-HOSTNAME=__DOMAIN__
\ No newline at end of file
+HOSTNAME=__DOMAIN__
+
+SECRET_KEY_BASE=__SECRET_KEY_BASE__
+SIGNING_SALT=__SIGNING_SALT__
+ENCRYPTION_SALT=__ENCRYPTION_SALT__
+
+SERVER_PORT=__PORT__
+PUBLIC_PORT=443
+
+# TODO : Configure S3 - with proper Yunohost question during installation
+#UPLOADS_S3_BUCKET=
+#UPLOADS_S3_ACCESS_KEY_ID=
+#UPLOADS_S3_SECRET_ACCESS_KEY=
+
+#UPLOAD_LIMIT=
\ No newline at end of file
diff --git a/scripts/install b/scripts/install
index d04f539..0c3689f 100644
--- a/scripts/install
+++ b/scripts/install
@@ -9,6 +9,10 @@
 source _common.sh
 source /usr/share/yunohost/helpers
 
+secret_key_base=$(ynh_string_random --length=24)
+signing_salt=$(ynh_string_random --length=24)
+encryption_salt=$(ynh_string_random --length=24)
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -28,37 +32,6 @@ ynh_script_progression --message="Configuring NGINX web server..." --weight=1
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
-#=================================================
-# SPECIFIC SETUP
-#=================================================
-# Configuration files
-#=================================================
-
-config="$install_dir/.config"
-env_file="$install_dir/.env"
-
-export MIX_ENV=prod FLAVOUR=classic
-
-ynh_exec_warn_less just config
-# generate secrets
-ynh_replace_string --match_string="SECRET_KEY_BASE=you-should-put-a-secure-string-here" --replace_string="SECRET_KEY_BASE=$(openssl rand -base64 128)" --target_file="$env_file"
-ynh_replace_string --match_string="SIGNING_SALT=you-should-put-a-different-secure-string-here" --replace_string="SIGNING_SALT=$(openssl rand -base64 128)" --target_file="$env_file"
-ynh_replace_string --match_string="ENCRYPTION_SALT=you-should-put-yet-another-secure-string-here" --replace_string="ENCRYPTION_SALT=$(openssl rand -base64 128)" --target_file="$env_file"
-
-# Configure server ports
-ynh_replace_string --match_string="HOSTNAME=localhost" --replace_string="HOSTNAME=$domain" --target_file="$env_file"
-# TODO : mail service ?
-ynh_replace_string --match_string="SERVER_PORT=4000" --replace_string="SERVER_PORT^=$port" --target_file="$env_file"
-ynh_replace_string --match_string="PUBLIC_PORT=4000" --replace_string="PUBLIC_PORT=443" --target_file="$env_file"
-
-# TODO : Configure S3 - with proper Yunohost question during installation
-# UPLOADS_S3_BUCKET=
-# UPLOADS_S3_ACCESS_KEY_ID=
-# UPLOADS_S3_SECRET_ACCESS_KEY=
-
-# max file upload size
-UPLOAD_LIMIT="${media_upload_size:0:2}000000" # convert the MB argument in bytes
-
 #=================================================
 # ADD A CONFIGURATION
 #=================================================
@@ -69,6 +42,14 @@ ynh_add_config --template="../conf/.env" --destination="$install_dir/.env"
 chmod 400 "$install_dir/.env"
 chown $app:$app "$install_dir/.env"
 
+#=================================================
+# SPECIFIC SETUP
+#=================================================
+# Configuration files
+#=================================================
+
+ynh_exec_warn_less just config
+
 #=================================================
 # Configure the release
 #=================================================