fixing dockerfile warnings

Author: isaaca26

Dockerfile

@@ -1,11 +1,11 @@
-FROM ubuntu:22.04 as builder
+FROM ubuntu:22.04 AS builder
 RUN apt-get update
 RUN apt-get install -y build-essential git zip curl zlib1g-dev
 
-ENV SDKMAN_DIR /root/.sdkman
-ENV JAVA_VERSION_20 20.0.2-graalce
-ENV JAVA_VERSION_21 21.0.2-graalce
-ENV JAVA_VERSION_22 22.0.2-graalce
+ENV SDKMAN_DIR=/root/.sdkman
+ENV JAVA_VERSION_20=20.0.2-graalce
+ENV JAVA_VERSION_21=21.0.2-graalce
+ENV JAVA_VERSION_22=22.0.2-graalce
 
 RUN ["mkdir", "-p", "/build"]