fix

Author: binarybaron

Dockerfile

@@ -6,5 +6,13 @@ LABEL org.opencontainers.image.description="PostgreSQL ${PG_VERSION} with pg_cro
 LABEL org.opencontainers.image.licenses="MIT"
 
 RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        ca-certificates \
+        wget \
+        gnupg \
+    && wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - \
+    && echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list \
+    && apt-get update \
     && apt-get install -y --no-install-recommends postgresql-${PG_VERSION}-cron \
+    && apt-get purge -y --auto-remove ca-certificates wget gnupg \
     && rm -rf /var/lib/apt/lists/*