Added deployment instructions

.gitignore

@@ -1,3 +1,4 @@
 .env
 .env.production
-docker
+docker
+dist

README.md

@@ -13,3 +13,26 @@ HASURA_GRAPHQL_ADMIN_SECRET=secret
 # at least 32 characters
 AUTH_JWT_SECRET=secret
 ```
+
+## Building and transfering an image in production
+
+### 1. Build & Save the production docker image
+
+```sh
+# build image for production
+docker-compose -f docker-compose.yml build
+# find image id
+docker images
+# save image
+docker save <IMAGE_ID> --output dist/<image.tag>.tar
+```
+
+### 2. Load and tag Image in production environment
+
+```sh
+sudo docker load --input path/to/<image.tag>.tar
+# find image id
+sudo docker images
+# tag image
+sudo docker tag <IMAGE_ID> <image:tag>
+```