More gitignore and dockerignore (#2844)

Add to gitignore and dockerignore some additional files created by the
different tests we have

.dockerignore

@@ -1,3 +1,6 @@
 **/.git/
+**/bin/
 **/data/
 **/docs/
+**/node_modules/
+**/package*.json

.gitignore

@@ -1,4 +1,6 @@
 /bin
+/node_modules
+package*.json
 constants.local.php
 
 # Temp files

Docker/.gitignore

@@ -0,0 +1 @@
+env.txt