fix: update Dockerfile to use forge-server directory

docker/Dockerfile.admin

@@ -4,7 +4,7 @@
 # 构建上下文为项目根目录，docker compose 中 context 设为 ..
 FROM eclipse-temurin:17-jdk AS builder
 WORKDIR /build
-COPY forge/ .
+COPY forge-server/ .
 RUN mvn clean package -pl forge-admin -am -DskipTests -Pprod
 
 FROM eclipse-temurin:17-jre

docker/Dockerfile.flow

@@ -4,7 +4,7 @@
 # 构建上下文为项目根目录，docker compose 中 context 设为 ..
 FROM eclipse-temurin:17-jdk AS builder
 WORKDIR /build
-COPY forge/ .
+COPY forge-server/ .
 RUN mvn clean package -pl forge-flow -am -DskipTests -Pprod
 
 FROM eclipse-temurin:17-jre