Use IPFS for hosting glob files for Urbit (#677)

* Use IPFS for hosting glob files for Urbit

* Add env configuration for IPFS endpoints to instructions

* Make ship pier dir configurable in remote deployment script

* Update remote deployment script to accept glob hash arg

stack_orchestrator/data/stacks/uniswap-urbit-app/README.md

@@ -41,10 +41,11 @@ network:
   ports:
     urbit-fake-ship:
       - '8080:80'
-    uniswap-glob-host:
-      - '3000:3000'
     uniswap-gql-proxy:
       - '4000:4000'
+    ipfs-glob-host:
+      - '8081:8080'
+      - '5001:5001'
 ...
 ```
 
@@ -74,6 +75,16 @@ Inside the deployment directory, open the file `config.env` and add variable for
   # Set this to GQL proxy server endpoint for uniswap app
   # (Eg. http://localhost:4000/graphql)
   CERC_UNISWAP_GQL=
+
+  # Optional IPFS endpoints:
+
+  # IFPS endpoint to host the glob file on
+  # (Default: http://ipfs-glob-host:5001 pointing to in-stack IPFS node)
+  CERC_IPFS_GLOB_HOST_ENDPOINT=
+
+  # IFPS endpoint to fetch the glob file from
+  # (Default: http://ipfs-glob-host:8080 pointing to in-stack IPFS node)
+  CERC_IPFS_SERVER_ENDPOINT=
   ```
 
 ## Start the stack