Add docker-compose file for executing tests

Signed-off-by: Maximilian Seifert <max.seifert@drglitch.net>

docker/docker-compose-test.yml

@@ -0,0 +1,37 @@
+version: "3.4"
+services:
+  monolith_test:
+    container_name: dendrite_monolith_test
+    hostname: monolith
+    entrypoint: ["bash", "./docker/test/monolith.sh"]
+    build: ./
+    volumes:
+      - ..:/build
+      - ./build/pkg:/build/pkg
+      - ./build/bin:/build/bin
+    networks:
+      - internal
+    depends_on:
+      - postgres
+    ports:
+      - "8008:8008"
+      - "8448:8448"
+
+  postgres:
+    container_name: dendrite_postgres
+    hostname: postgres
+    image: postgres:9.5
+    restart: always
+    volumes:
+      - ./postgres/create_db.sh:/docker-entrypoint-initdb.d/20-create_db.sh
+    environment:
+      POSTGRES_PASSWORD: itsasecret
+      POSTGRES_USER: dendrite
+    networks:
+      - internal
+    ports:
+      - 15432:5432
+
+networks:
+  internal:
+    attachable: true

docker/test/monolith.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+rm -rf build
+bash ./docker/build.sh
+
+gb test