fix: Fix dockerfile and docker-compose for testing suite (#239)

- This was broken after the postgresql-partman update: https://github.com/dbsystel/postgresql-partman-container/pull/32
- Also needed to specify proper env variables

Co-authored-by: TAMARA LIPOWSKI <data.lipowski@extaccount.com>

testing/docker-compose.yaml

@@ -6,12 +6,14 @@ services:
       dockerfile: postgres.Dockerfile
     restart: "always"
     environment:
-      POSTGRESQL_PASSWORD: mypassword
-      POSTGRESQL_DATABASE: tycho_indexer_0
-      POSTGRESQL_USERNAME: postgres
+      POSTGRES_PASSWORD: mypassword
+      POSTGRES_DATABASE: tycho_indexer_0
+      POSTGRES_USERNAME: postgres
       POSTGRESQL_SHARED_PRELOAD_LIBRARIES: pg_cron
     ports:
       - "5431:5432"
     shm_size: "1gb"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
 volumes:
   postgres_data:

testing/postgres.Dockerfile

@@ -7,6 +7,7 @@
 FROM ghcr.io/dbsystel/postgresql-partman:15-5
 ARG PGCRON_VERSION="1.6.2"
 USER root
+RUN apk update && apk add --no-cache wget build-base clang19 llvm19
 RUN cd /tmp \
     && wget "https://github.com/citusdata/pg_cron/archive/refs/tags/v${PGCRON_VERSION}.tar.gz" \
     && tar zxf v${PGCRON_VERSION}.tar.gz \
@@ -14,5 +15,10 @@ RUN cd /tmp \
     && make \
     && make install \
     && cd .. && rm -r pg_cron-${PGCRON_VERSION} v${PGCRON_VERSION}.tar.gz
-RUN echo "cron.database_name = 'tycho_indexer_0'" >> /opt/bitnami/postgresql/conf/postgresql.conf
-USER 1001
+
+# Add configuration to postgresql.conf template
+RUN echo "shared_preload_libraries = 'pg_partman_bgw,pg_cron'" >> /usr/local/share/postgresql/postgresql.conf.sample \
+    && echo "cron.database_name = 'tycho_indexer_0'" >> /usr/local/share/postgresql/postgresql.conf.sample
+
+# Stay as root user for PostgreSQL to work properly
+# USER 1001