postgres now needs building

postgres/Dockerfile

@@ -0,0 +1,3 @@
+FROM postgres:latest
+COPY postgres/setup.sh /docker-entrypoint-initdb.d/setup.sh
+RUN chmod 0666 /docker-entrypoint-initdb.d/setup.sh

postgres/setup.sh

@@ -0,0 +1,24 @@
+#! /bin/bash
+
+set -e
+
+sed -i "/host all all all/d" "$PGDATA/pg_hba.conf"
+echo "host replication $REPLICATION_USER all md5" >> "$PGDATA/pg_hba.conf"
+echo "host all $WUBLOADER_USER all md5" >> "$PGDATA/pg_hba.conf"
+
+psql -v ON_ERROR_STOP=1 -U postgres <<-EOSQL
+
+CREATE USER $WUBLOADER_USER LOGIN PASSWORD '$WUBLOADER_PASSWORD';
+CREATE USER $REPLICATION_USER LOGIN REPLICATION PASSWORD '$REPLICATION_PASSWORD';
+
+EOSQL
+
+cat >> ${PGDATA}/postgresql.conf <<EOF
+
+wal_level = replica
+archive_mode = on
+archive_command = 'cd .'
+max_wal_senders = 8
+wal_keep_segments = 8
+
+EOF