Execute the postinstall script in dockerfile after the copy of the app

Dockerfile

@@ -6,10 +6,12 @@ COPY ./package.json /app/package.json
 WORKDIR /app
 # Install npm dependencies
 RUN npm install
-RUN npm run postinstall
 # Copy the project
 COPY . /app
 
+# Launch postinstall script (to include crypto module)
+RUN npm run postinstall
+
 ARG env
 
 # Building the Angular app /dist i18n