Update Dockerfile

Updated to run the Docker container as a non-root user with user privileges instead of root privileges, since it helps mitigate risks.

Dockerfile

@@ -2,6 +2,12 @@
 # FROM eclipse-temurin:21-jdk-jammy as builder
 FROM eclipse-temurin:21-jdk-alpine as builder
 
+# Run the Docker container as a non-root user with user privileges instead of root privileges, since it helps mitigate risks. 
+RUN addgroup deploymentgroup; adduser  --ingroup deploymentgroup --disabled-password deployment
+
+# The USER instruction sets the preferred user name (or UID) and optionally the user group (or GID) while running the image — and for any subsequent RUN, CMD, or ENTRYPOINT instructions. 
+USER deployment
+
 # The work directory. 
 WORKDIR /opt/app
 
@@ -46,6 +52,12 @@ RUN ./mvnw clean install -DskipTests
 # FROM eclipse-temurin:21-jdk-jammy
 FROM eclipse-temurin:21-jdk-alpine
 
+# Run the Docker container as a non-root user with user privileges instead of root privileges, since it helps mitigate risks. 
+RUN addgroup deploymentgroup; adduser  --ingroup deploymentgroup --disabled-password deployment
+
+# The USER instruction sets the preferred user name (or UID) and optionally the user group (or GID) while running the image — and for any subsequent RUN, CMD, or ENTRYPOINT instructions. 
+USER deployment
+
 WORKDIR /opt/app
 
 # The environment port to expose.