feat(docker): improve yarn cache

Dockerfile

@@ -1,12 +1,24 @@
+ARG NODE_VERSION=16-alpine
+
 # Install dependencies only when needed
-FROM node:16-alpine AS deps
+FROM node:$NODE_VERSION AS prepare
 RUN apk add --no-cache libc6-compat=1.2.2-r7
 WORKDIR /app
 COPY package.json yarn.lock ./
+
+# Keep yarn install cache when bumping version and dependencies still the sames
+RUN node -e " \
+  const package = JSON.parse(fs.readFileSync('/app/package.json')); \
+  const packageZero = { ...package, version: '0.0.0' };  \
+  fs.writeFileSync('/app/package.json', JSON.stringify(packageZero));"
+
+FROM node:$NODE_VERSION as deps
+WORKDIR /app
+COPY --from=prepare /app/package.json /app/yarn.lock ./
 RUN yarn install --frozen-lockfile
 
 # Rebuild the source code only when needed
-FROM node:16-alpine AS builder
+FROM node:$NODE_VERSION AS builder
 WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .