feat: add docker-compose.yaml to set up postgres

protocol-testing/docker-compose.yaml

@@ -0,0 +1,17 @@
+version: "3.1"
+services:
+  db:
+    build:
+      context: .
+      dockerfile: postgres.Dockerfile
+    restart: "always"
+    environment:
+      POSTGRESQL_PASSWORD: mypassword
+      POSTGRESQL_DATABASE: tycho_indexer_0
+      POSTGRESQL_USERNAME: postgres
+      POSTGRESQL_SHARED_PRELOAD_LIBRARIES: pg_cron
+    ports:
+      - "5431:5432"
+    shm_size: "1gb"
+volumes:
+  postgres_data:

protocol-testing/postgres.Dockerfile

@@ -0,0 +1,18 @@
+# This Dockerfile creates a custom postgres image used for CI and local deployment.
+# This is required because we use some postgres extensions that aren't in the generic 
+# Postgres image such as pg_partman or pg_cron.
+
+# As an image with pg_partman already exist, we start from this one and add pg_cron 
+# and possibly other extensions on top of that.
+FROM ghcr.io/dbsystel/postgresql-partman:15-5
+ARG PGCRON_VERSION="1.6.2"
+USER root
+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 \
+    && cd pg_cron-${PGCRON_VERSION} \
+    && make \
+    && make install \
+    && cd .. && rm -r pg_cron-${PGCRON_VERSION} v${PGCRON_VERSION}.tar.gz
+RUN echo "cron.database_name = 'tycho_indexer_0'" >> /opt/bitnami/postgresql/conf/postgresql.conf
+USER 1001