fixes

- fixed app dir
- fixed missing readme and version file
- keep config on update/remove

DEBIAN/postinst

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+WORKING_DIR=/usr/share/fastapi-dls
 CONFIG_DIR=/etc/fastapi-dls
 
 echo "> Create config directory ..."
@@ -15,12 +16,12 @@ After=network.target
 User=www-data
 Group=www-data
 AmbientCapabilities=CAP_NET_BIND_SERVICE
-WorkingDirectory=/usr/share/fastapi-dls
+WorkingDirectory=$WORKING_DIR
 EnvironmentFile=$CONFIG_DIR/env
 ExecStart=uvicorn main:app \\
   --env-file /etc/fastapi-dls/env \\
   --host \$DLS_URL --port \$DLS_PORT \\
-  --app-dir /usr/share/fastapi-dls \\
+  --app-dir $WORKING_DIR/app \\
   --ssl-keyfile /etc/fastapi-dls/webserver.key \\
   --ssl-certfile /etc/fastapi-dls/webserver.crt \\
   --proxy-headers
@@ -41,7 +42,7 @@ cat <<EOF >$CONFIG_DIR/env
 DLS_URL=127.0.0.1
 DLS_PORT=443
 LEASE_EXPIRE_DAYS=90
-DATABASE=sqlite:////usr/share/fastapi-dls/db.sqlite
+DATABASE=sqlite:///$CONFIG_DIR/db.sqlite
 INSTANCE_KEY_RSA=$CONFIG_DIR/instance.private.pem
 INSTANCE_KEY_PUB=$CONFIG_DIR/instance.public.pem
 
@@ -77,6 +78,7 @@ if [[ -f $CONFIG_DIR/webserver.key ]]; then
 fi
 
 chown -R www-data:www-data $CONFIG_DIR/*
+chown -R www-data:www-data $WORKING_DIR
 
 cat <<EOF