[fix][add][mod] fixed typo in api.yml, added data folder and modified compose

- [add] added existing data folder to prevent docker creating one as root
 - [mod] docker-compose.yml now uses $EUID as default user and group id

api.yml

@@ -3,7 +3,7 @@ info:
   description: "Simple dynDNS via Rest-API.
 
 
-  The demo database will reset every **60** minutes. A maximum of 250 clients can exist in the demo database.
+  The demo database will reset every **60** minutes. A maximum of 250 clients can exist in the demo database.  
 
   The following default clients and api keys can be used:
 
@@ -382,4 +382,4 @@ components:
       pattern: "^(((25[0-5]|(2[0-4]|1[0-9]|[1-9]|)[0-9])(.(?!$)|$)){4})?$"
 externalDocs:
   description: "<rynDNS source code>"
-  url: "https://git.pdev.dev/pdev/ryndns"
+  url: "https://git.pdev.dev/pascal/ryndns"

docker-compose.yml

@@ -5,8 +5,8 @@ services:
     build:
       context: .
       args:
-        USER_UID: ${UID_PROXY:-12001}
-        USER_GID: ${UID_PROXY:-12001}
+        USER_UID: ${UID_PROXY:-$EUID}
+        USER_GID: ${UID_PROXY:-$EUID}
     environment:
       # set to run app in subdirectory
       RAILS_RELATIVE_URL_ROOT: /rynDNS