ci: fix docker build with node:lts-alpine (#7663)

Author: mtrezza

Dockerfile

@@ -1,20 +1,30 @@
+############################################################
 # Build stage
+############################################################
 FROM node:lts-alpine as build
 
 RUN apk update; \
   apk add git;
 WORKDIR /tmp
+
+# Copy package.json first to benefit from layer caching
 COPY package*.json ./
 
-# Copy local dependencies for CI tests
-COPY spec/dependencies spec/dependencies
+# Copy src to have config files for install
+COPY . .
 
+# Clean npm cache; added to fix an issue with the install process
 RUN npm cache clean --force
+
+# Install all dependencies
 RUN npm ci
-COPY . .
+
+# Run build steps
 RUN npm run build
 
+############################################################
 # Release stage
+############################################################
 FROM node:lts-alpine as release
 
 RUN apk update; \
@@ -26,6 +36,7 @@ WORKDIR /parse-server
 
 COPY package*.json ./
 
+# Clean npm cache; added to fix an issue with the install process
 RUN npm cache clean --force
 RUN npm ci --production --ignore-scripts