add minor improvement and fallback values

apps/security/docker-compose.yml

@@ -6,17 +6,17 @@ services:
     environment:
       # Change Language:
       # (Supports: en, ua, ru, tr, no, pl, fr, de, ca, es, ko, vi, nl, is, pt, chs, cht, it, th, hi, ja, si)
-      - LANG=de
+      - LANG=${WG_LANG:-de}
       # ⚠️ Required:
       # Change this to your host's public address
-      - WG_HOST=${SERVER_IP}
+      - WG_HOST=${SERVER_IP:-localhost}
 
       # Optional:
       # - PASSWORD_HASH=$$2y$$10$$hBCoykrB95WSzuV4fafBzOHWKu9sbyVa34GJr8VV5R/pIelfEMYyG # (needs double $$, hash of 'foobar123'; see "How_to_generate_an_bcrypt_hash.md" for generate the hash)
       # - PORT=51821
       # - WG_PORT=51820
       # - WG_CONFIG_PORT=92820
-      - WG_DEFAULT_ADDRESS=22.22.22.0
+      - WG_DEFAULT_ADDRESS=${WG_DEFAULT_ADDRESS:-22.22.22.0}
       # - WG_DEFAULT_DNS=1.1.1.1
       # - WG_MTU=1420
       # - WG_ALLOWED_IPS=192.168.15.0/24, 10.0.1.0/24