feat: standardize alpine versions and pin pnpm and upx versions

Dockerfile

@@ -1,15 +1,15 @@
 # Build spa
 FROM node:18.18.2-alpine3.18 AS spa-builder
 WORKDIR /app
-RUN npm install -g pnpm
+RUN npm install -g pnpm@8.10.0
 COPY frontend /app
 RUN rm -rf /app/node_modules
 RUN pnpm install --frozen-lockfile
 RUN npx vite build --outDir /app/dist
 
 # Build app
-FROM golang:1.21.3-alpine3.17 AS builder
-RUN apk add upx
+FROM golang:1.21.3-alpine3.18 AS builder
+RUN apk add --no-cache upx=4.0.2-r0
 WORKDIR /app
 COPY go.mod .
 COPY go.sum .