Updating yarn to current version

.gitattributes

@@ -0,0 +1,2 @@
+/.yarn/releases/** binary
+/.yarn/plugins/** binary

.gitignore

@@ -8,6 +8,15 @@ npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
 
+# Yarn setup
+.yarn/*
+!.yarn/cache
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+
 # Ignore built files
 dist/
 build/

.yarnrc.yml

@@ -0,0 +1,3 @@
+nodeLinker: node-modules
+
+yarnPath: .yarn/releases/yarn-4.5.3.cjs

Dockerfile

@@ -13,6 +13,8 @@ RUN npm uninstall npm -g
 # Setup a non-root user to run the app
 WORKDIR /usr/local/app
 RUN useradd -m appuser && chown -R appuser /usr/local/app
+COPY package.json yarn.lock ./
+RUN corepack enable
 USER appuser
 
 
@@ -26,7 +28,6 @@ USER appuser
 ###########################################################
 FROM base AS dev
 ENV NODE_ENV=development
-COPY package.json yarn.lock ./
 RUN yarn install
 CMD ["yarn", "dev-container"]
 
@@ -39,8 +40,7 @@ CMD ["yarn", "dev-container"]
 ###########################################################
 FROM base AS final
 ENV NODE_ENV=production
-COPY package.json yarn.lock ./
-RUN yarn install && yarn cache clean --force
+RUN yarn install && yarn cache clean
 COPY ./src ./src
 
 EXPOSE 3000

package.json

@@ -44,5 +44,5 @@
       "prettier --write"
     ]
   },
-  "packageManager": "yarn@1.22.21+sha1.1959a18351b811cdeedbd484a8f86c3cc3bbaf72"
+  "packageManager": "yarn@4.5.3"
 }