feat(Traefik): Add default value in yml

examples/traefik.cool.life/.env

@@ -6,5 +6,4 @@ COMPOSE_FILE=../../traefik/docker-compose.yml
 TRAEFIK_VOLUME_NAME=kifeart
 TRAEFIK_NETWORK_NAME=kifeart
 TRAEFIK_CONTAINER_NAME=kifeart
-TRAEFIK_IMAGE=traefik:v2.4.5
 TRAEFIK_DOMAIN=traefik.cool.life

traefik/.env

@@ -1,5 +1 @@
-TRAEFIK_VOLUME_NAME=traefik
-TRAEFIK_NETWORK_NAME=traefik
-TRAEFIK_CONTAINER_NAME=traefik
-TRAEFIK_IMAGE=traefik:v2.4.5
 TRAEFIK_DOMAIN=localhost

traefik/docker-compose.yml

@@ -2,20 +2,20 @@ version: "3.8"
 
 volumes:
   traefik:
-    name: ${TRAEFIK_VOLUME_NAME}
+    name: ${TRAEFIK_VOLUME_NAME:-traefik}
 
 networks:
   traefik:
-    name: ${TRAEFIK_NETWORK_NAME}
+    name: ${TRAEFIK_NETWORK_NAME:-traefik}
 
 services:
   traefik:
-    container_name: ${TRAEFIK_CONTAINER_NAME}
-    image: ${TRAEFIK_IMAGE}
+    container_name: ${TRAEFIK_CONTAINER_NAME:-traefik}
+    image: ${TRAEFIK_IMAGE:-traefik:v2.4.5}
     restart: always
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
-      - ${TRAEFIK_VOLUME_NAME}:/traefik
+      - ${TRAEFIK_VOLUME_NAME:-traefik}:/traefik
       - /etc/timezone:/etc/timezone:ro
       - /etc/localtime:/etc/localtime:ro
     ports:
@@ -24,7 +24,7 @@ services:
         protocol: tcp
         mode: host
     networks:
-      - ${TRAEFIK_NETWORK_NAME}
+      - ${TRAEFIK_NETWORK_NAME:-traefik}
     command:
       - --api.insecure=true
       - --log.level=INFO
@@ -34,14 +34,14 @@ services:
 
       - --providers.docker
       - --providers.docker.exposedbydefault=false
-      - --providers.docker.network=${TRAEFIK_NETWORK_NAME}
+      - --providers.docker.network=${TRAEFIK_NETWORK_NAME:-traefik}
 
       - --entrypoints.web.address=:80
       - --entryPoints.web.forwardedHeaders.insecure
     labels:
       traefik.enable: 'true'
 
-      traefik.http.routers.traefik.rule: 'Host(`${TRAEFIK_DOMAIN}`)'
+      traefik.http.routers.traefik.rule: 'Host(`${TRAEFIK_DOMAIN:?err}`)'
       traefik.http.routers.traefik.entrypoints: 'web'
 
       traefik.http.services.traefik.loadbalancer.server.port: '8080'