Use variables

db.env

@@ -1,3 +1,3 @@
-POSTGRES_PASSWORD=
+POSTGRES_PASSWORD=${DB_PASSWORD:?Database Password Required}
 POSTGRES_DB=nextcloud
 POSTGRES_USER=nextcloud

docker-compose.yml

@@ -1,5 +1,4 @@
 volumes:
-  # NextCloud
   nc-data:
   db-data:
 
@@ -20,9 +19,9 @@ services:
         target: /tmp:exec
     environment:
       - TRUSTED_PROXIES=172.16.0.0/12 192.168.0.0/16 10.0.0.0/8 fc00::/7 fe80::/10 2001:db8::/32
-      - NEXTCLOUD_TRUSTED_DOMAINS=palta.cyou
+      - NEXTCLOUD_TRUSTED_DOMAINS=${DOMAIN_NAME:?}
       - OVERWRITEPROTOCOL=https
-      - OVERWRITECLIURL=https://palta.cyou
+      - OVERWRITECLIURL=https://${DOMAIN_NAME}
 #      - VIRTUAL_PROTO=fastcgi
 #      - VIRTUAL_ROOT=xxx
       - POSTGRES_HOST=db
@@ -58,8 +57,8 @@ services:
     build: ./images/ngx
     restart: always
     environment:
-      - VIRTUAL_HOST=palta.cyou
-      - LETSENCRYPT_HOST=palta.cyou
+      - VIRTUAL_HOST=${DOMAIN_NAME}
+      - LETSENCRYPT_HOST=${DOMAIN_NAME}
     volumes:
       - nc-data:/var/www/html:ro
     depends_on:
@@ -90,14 +89,14 @@ services:
     image: collabora/code
     restart: always
     privileged: true
-    hostname: collabora.palta.cyou
+    hostname: ${COLLABORA_DOMAIN_NAME:-collabora.${DOMAIN_NAME}}
     environment:
-      - VIRTUAL_HOST=collabora.palta.cyou
+      - VIRTUAL_HOST=${COLLABORA_DOMAIN_NAME:-collabora.${DOMAIN_NAME}}
       - VIRTUAL_PORT=9980
       - VIRTUAL_PROTO=https
-      - LETSENCRYPT_HOST=collabora.palta.cyou
-      - server_name=collabora.palta.cyou
-      - aliasgroup1=https://palta.cyou
+      - LETSENCRYPT_HOST=${COLLABORA_DOMAIN_NAME:-collabora.${DOMAIN_NAME}}
+      - server_name=${COLLABORA_DOMAIN_NAME:-collabora.${DOMAIN_NAME}}
+      - aliasgroup1=https://${DOMAIN_NAME}
     networks:
       - reverse_proxy-tier
       - nextcloud