L2SS-822: parameterize timescaledb source image

docker-compose/.env

@@ -15,6 +15,7 @@ TANGO_POGO_VERSION=9.6.34
 TANGO_REST_VERSION=1.14.6
 TANGO_STARTER_VERSION=2021-05-28
 
+PG_TIMESCALEDB_VERSION=latest-pg12
 PG_SUPERUSER_PASSWORD=password
 PG_HDB_PASSWORD=hdbpp
 MYSQL_ROOT_PASSWORD=secret

docker-compose/archiver-timescale.yml

@@ -8,6 +8,8 @@ services:
     image: timescaledb
     build:
         context: timescaledb
+        args: 
+            SOURCE_IMAGE: timescale/timescaledb:${PG_TIMESCALEDB_VERSION}
     container_name: ${CONTAINER_NAME_PREFIX}archiver-timescale
     networks:
       - control

docker-compose/timescaledb/Dockerfile

-FROM timescale/timescaledb:latest-pg12
+ARG SOURCE_IMAGE
+FROM ${SOURCE_IMAGE}
 
 # Set admin role to perform DB creation
 COPY resources/01_admin.sh docker-entrypoint-initdb.d/002_admin.sh