Update docker-compose.yml to use environment variables for port and cache TTL

docker-compose.yml

@@ -4,8 +4,8 @@ services:
     build: .
     container_name: siti-plugin-repo
     ports:
-      - "8080:3001"
+      - "${HOST_PORT:-8080}:${PORT:-3001}"
     environment:
-      PORT: "3001"
-      CACHE_TTL_MS: "600000"
+      PORT: "${PORT:-3001}"
+      CACHE_TTL_MS: "${CACHE_TTL_MS:-600000}"
     restart: unless-stopped