Update README.md

Author: mpcen

mongo_seed/README.md

@@ -2,3 +2,20 @@ This is used to populate two Mongo collections in this dev environment.
 
 Currently, anytime there is a change to this docker image, it must be manually pushed to 
 the [Clearly Defined Docker Hub](https://hub.docker.com/r/clearlydefined/docker_dev_env_experiment_clearlydefined_mongo_seed)
+
+### To push latest image to Docker Hub
+1. Log into docker
+
+   `docker login -u clearlydefined -p <PASSWORD_FROM_KEYVAULT`
+2. Pull latest code from GitHub repo
+3. Build latest image
+
+    `docker-compose build`
+
+4. Build and tag image
+  
+    `docker build -t clearlydefined/docker_dev_env_experiment_clearlydefined_mongo_seed:latest`
+
+5. Push image to Docker Hub
+  
+    `docker push clearlydefined/docker_dev_env_experiment_clearlydefined_mongo_seed:latest`