build: optimize Dockerfile and .dockerignore for container registry

.dockerignore

@@ -1,4 +1,6 @@
 node_modules
 .git
 .gitignore
-README.md
+*.md
+*.ps1
+*.csv

Dockerfile

@@ -1,5 +1,5 @@
 FROM node:20-alpine
-RUN mkdir -p /app && chown -R node:node /app
+RUN mkdir -p /app /data && chown -R node:node /app /data
 WORKDIR /app
 USER node
 COPY --chown=node:node package*.json ./