fix(ops): ignore .env files

.env files were not being ignored by docker. This meant that any local
environment variable changes you placed into an .env file would be
pulled into docker images built inside of the ops package. Docker images
should only be using environment variables as specified in their
respective environment folders and should not copy over .env files.

.dockerignore

 .github
 
 node_modules
+.env
+**/.env
 
 test
 **/*_test.go