Use modern ENV notation

Dockerfile

@@ -1,7 +1,7 @@
 FROM ubuntu:24.04@sha256:7c06e91f61fa88c08cc74f7e1b7c69ae24910d745357e0dfe1d2c0322aaf20f9 AS compiler-common
 ENV DEBIAN_FRONTEND=noninteractive
-ENV LANG C.UTF-8
-ENV LC_ALL C.UTF-8
+ENV LANG=C.UTF-8
+ENV LC_ALL=C.UTF-8
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 RUN apt-get update \
@@ -49,7 +49,7 @@ ENV AUTOVACUUM=on
 ENV UPDATES=disabled
 ENV REPLICATION_URL=https://planet.openstreetmap.org/replication/hour/
 ENV MAX_INTERVAL_SECONDS=3600
-ENV PG_VERSION 17
+ENV PG_VERSION=17
 
 RUN ln -snf "/usr/share/zoneinfo/$TZ" /etc/localtime && echo "$TZ" > /etc/timezone