Fix MySQL IDENTITY strategy (cloud safe)

Fix Dockerfile: use mvn instead of mvnw for Render

Fix Dockerfile paths for Render build context

Remove secrets and use env variables for DB config

Use environment variables for DB config (remove secrets)

Fix pom.xml: Java 17 + Lombok compiler plugin

Enable Maven debug logs for Railway build

Force update Dockerfile with Maven build steps

Fix Dockerfile: add Maven build step

Fix Dockerfile COPY paths for Railway build context

Fix Dockerfile: proper Maven multi-stage build

Fix Dockerfile COPY paths for Railway build

Add Dockerfile for Railway backend deployment

Use multi-stage Docker build with Maven image (stable fix)

Fix mvnw permission issue in Dockerfile