Update docker file

Author: cbaker6

Dockerfile

@@ -1,8 +1,12 @@
 FROM postgres:17-bullseye
 
-ENV POSTGIS_MAJOR 3
-ENV POSTGIS_VERSION 3.5.0+dfsg-1.pgdg110+1
-ENV POSTGRES_INITDB_ARGS "--data-checksums"
+LABEL maintainer="HIPAA Postgres w/ PostGIS Project" \
+      org.opencontainers.image.description="PostGIS 3.5.0+dfsg-1.pgdg110+1 spatial database extension with PostgreSQL 17 bullseye" \
+      org.opencontainers.image.source="https://github.com/netreconlab/hipaa-postgres/"
+
+ENV POSTGIS_MAJOR=3
+ENV POSTGIS_VERSION=3.5.0+dfsg-1.pgdg110+1
+ENV POSTGRES_INITDB_ARGS="--data-checksums"
 
 RUN apt-get update \
  && apt-cache showpkg postgresql-$PG_MAJOR-postgis-$POSTGIS_MAJOR \