Change test for docker-container detection

.github/workflows/test-docker.yml

@@ -11,8 +11,7 @@ jobs:
       name: Checkout
      
     - name: Build and Test
-      shell: 'script -q -e -c "bash {0}"'
       run: |
         docker-compose -f docker-compose.yml -f docker-compose.build.yml up --build -d
         ./wait-for-it.sh localhost:8000 -t 60 -- echo "WebODM is up"
-        docker-compose exec webapp /bin/bash -c "/webodm/webodm.sh test"
+        docker-compose exec -T webapp /webodm/webodm.sh test

webodm.sh

@@ -287,8 +287,7 @@ rebuild(){
 run_tests(){
     # If in a container, we run the actual test commands
     # otherwise we launch this command from the container
-    in_container=$(grep 'docker\|lxc' /proc/1/cgroup || true)
-    if [[ "$in_container" != "" ]]; then
+    if [[ -f /.dockerenv ]]; then
         echo -e "\033[1mRunning frontend tests\033[0m"
         run "npm run test"