Try to help @mattwr18

I give up now after numerous attempts to reduce the docker image size.
The only thing left is that I've put the NODE_ENV=.. configuration in
the docker-compose.X.yml files, I think that's slightly cleaner

.travis.yml

@@ -27,9 +27,9 @@ install:
   - yarn add cypress-cucumber-preprocessor
 
 script:
-  - docker-compose exec -e NODE_ENV=test webapp yarn run lint
-  - docker-compose exec -e NODE_ENV=test webapp yarn run test
-  - docker-compose -f ../Nitro-Backend/docker-compose.yml exec backend yarn run db:seed > /dev/null
+  - docker-compose exec webapp yarn run lint
+  - docker-compose exec webapp yarn run test
+  - docker-compose -f ../Nitro-Backend/docker-compose.yml exec backend yarn run db:seed
   - wait-on http://localhost:3000
   - cypress run --record --key $CYPRESS_TOKEN
 

docker-compose.override.yml

@@ -2,6 +2,8 @@ version: '3.7'
 
 services:
   webapp:
+    environment:
+      - NODE_ENV=development
     build:
       context: .
       target: build-and-test

docker-compose.travis.yml

@@ -2,6 +2,8 @@ version: "3.7"
 
 services:
   webapp:
+    environment:
+      - NODE_ENV=test
     build:
       context: .
       target: build-and-test