Fail build when upload fails

Also updates test to catch this issue

push.sh

@@ -37,7 +37,7 @@ fi
 while [ "${PLUGIN_ATTEMPTS}" -gt 0 ]; do
 
     # Uploading the file
-    curl "${ARGS[@]}" --upload-file "$PLUGIN_FILE" "$PLUGIN_DESTINATION" && {
+    curl --fail-with-body --show-error --silent "${ARGS[@]}" --upload-file "$PLUGIN_FILE" "$PLUGIN_DESTINATION" && {
         # Terminate the script as soon as the upload is successful
     echo "[INFO] Upload was successful."
     exit 0

tests/docker-compose-private.yml

@@ -1,8 +1,8 @@
 ---
-version: '2.4'
+version: '3'
 services:
   webdav:
-    image: sashgorokhov/webdav
+    image: bytemark/webdav
     environment:
       USERNAME: jdoe
       PASSWORD: hunter2

tests/docker-compose-public.yml

@@ -1,8 +1,10 @@
 ---
-version: '2.4'
+version: '3'
 services:
   webdav:
-    image: sashgorokhov/webdav
+    image: bytemark/webdav
+    environment:
+      ANONYMOUS_METHODS: ALL
 
   plugin:
     build: