add healthchecks where possible

compose.yml

@@ -62,6 +62,12 @@ services:
       - db
       - redis
     environment: *default-env
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3000"]
+      interval: 30s
+      timeout: 10s
+      retries: 10
+      start_period: 2m
     deploy:
       restart_policy:
         condition: on-failure
@@ -110,6 +116,8 @@ services:
     image: redis:5.0
     networks:
       - backend
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
   #mailin:
   #  image: loomio/mailin-docker:latest
   #  networks: