Make the container timezone configurable (#4084)

Co-authored-by: Ilya Kuramshin <iliax@proton.me>

kafka-ui-api/Dockerfile

@@ -1,7 +1,11 @@
 #FROM azul/zulu-openjdk-alpine:17-jre-headless
 FROM azul/zulu-openjdk-alpine@sha256:a36679ac0d28cb835e2a8c00e1e0d95509c6c51c5081c7782b85edb1f37a771a
 
-RUN apk add --no-cache gcompat # need to make snappy codec work
+RUN apk add --no-cache \
+    # snappy codec
+    gcompat \
+    # configuring timezones
+    tzdata
 RUN addgroup -S kafkaui && adduser -S kafkaui -G kafkaui
 
 # creating folder for dynamic config usage (certificates uploads, etc)