Reorder FROM instruction in Dockerfiles

The order of the Docker instructions in Dockerfiles for both server, client, and proxy has been adjusted, so the FROM instruction is now the first instruction in each Dockerfile. This change complies with best practices for Dockerfile instruction order.

client/Dockerfile

@@ -1,9 +1,8 @@
+FROM node:22-alpine as base
 LABEL org.opencontainers.image.source=https://github.com/SquirrelCorporation/SquirrelServersManager
 LABEL org.opencontainers.image.description="SSM Client"
 LABEL org.opencontainers.image.licenses="GNU AFFERO GENERAL PUBLIC LICENSE"
 
-FROM node:22-alpine as base
-
 WORKDIR /client
 RUN npm install -g npm@latest
 RUN npm install -g @umijs/max

proxy/Dockerfile

@@ -1,7 +1,7 @@
+FROM nginx:1.25.5
 LABEL org.opencontainers.image.source=https://github.com/SquirrelCorporation/SquirrelServersManager
 LABEL org.opencontainers.image.description="SSM Proxy"
 LABEL org.opencontainers.image.licenses="GNU AFFERO GENERAL PUBLIC LICENSE"
 
-FROM nginx:1.25.5
 COPY default.conf /etc/nginx/conf.d
 COPY www/index.html /usr/share/nginx/html/custom.html

server/Dockerfile

@@ -1,9 +1,8 @@
+FROM node:22-alpine as base
 LABEL org.opencontainers.image.source=https://github.com/SquirrelCorporation/SquirrelServersManager
 LABEL org.opencontainers.image.description="SSM Server"
 LABEL org.opencontainers.image.licenses="GNU AFFERO GENERAL PUBLIC LICENSE"
 
-FROM node:22-alpine as base
-
 WORKDIR /server
 RUN apk update && apk add ansible nmap sudo openssh sshpass py3-pip expect
 RUN npm install -g npm@latest