update README

Author: Tristen Harr

README.md

@@ -30,4 +30,95 @@ Create a new supergraph:
 
 Start a watch session, additionally split of a new terminal to continue running commands from.
 
-```HASURA_DDN_PAT=$(ddn auth print-pat) docker compose up --build --watch```
+```HASURA_DDN_PAT=$(ddn auth print-pat) docker compose up --build --watch```
+
+In the new terminal, perform a local build:
+
+```ddn supergraph build local --output-dir engine```
+
+Initialize a subgraph:
+
+```
+ddn subgraph init python \
+  --dir python \
+  --target-supergraph supergraph.local.yaml \
+  --target-supergraph supergraph.cloud.yaml
+```
+
+Initialize a Python connector:
+
+```
+ddn connector init python \
+  --subgraph python/subgraph.yaml \
+  --hub-connector hasura/python \
+  --configure-port 8085 \
+  --add-to-compose-file compose.yaml
+```
+
+In the `.env.local` you will need to remove the `HASURA_CONNECTOR_PORT` variable which is set to `8085`. This is because the connector will run on that port but the docker-mapping is set to map 8085 -> 8080.
+
+Before:
+```
+OTEL_EXPORTER_OTLP_TRACES_ENDPOINT=http://local.hasura.dev:4317
+OTEL_SERVICE_NAME=python_python
+HASURA_CONNECTOR_PORT=8085
+```
+
+After:
+```
+OTEL_EXPORTER_OTLP_TRACES_ENDPOINT=http://local.hasura.dev:4317
+OTEL_SERVICE_NAME=python_python
+```
+
+Add the connector link:
+
+```
+ddn connector-link add python \
+  --subgraph python/subgraph.yaml \
+  --configure-host http://local.hasura.dev:8085 \
+  --target-env-file python/.env.python.local
+```
+
+Stop the watch session using Ctrl-C and restart it.
+
+```
+HASURA_DDN_PAT=$(ddn auth print-pat) docker compose up --build --watch
+```
+
+Once the connector is running, you can update the connector-link.
+
+```
+ddn connector-link update python \
+  --subgraph python/subgraph.yaml \
+  --env-file python/.env.python.local \
+  --add-all-resources
+```
+
+Push the build to the locally running engine:
+
+```
+ddn supergraph build local \
+  --output-dir engine \
+  --subgraph-env-file python:python/.env.python.local
+```
+
+Now you should be able to write your code in the `functions.py` file, and each time you make changes and save the connector should automatically restart inside the watch session, you'll then need to track those changes and push them to engine.
+
+You can do that by re-running the above commands:
+
+To track the changes:
+
+```
+ddn connector-link update python \
+  --subgraph python/subgraph.yaml \
+  --env-file python/.env.python.local \
+  --add-all-resources
+```
+
+To push these changes to engine:
+
+```
+ddn supergraph build local \
+  --output-dir engine \
+  --subgraph-env-file python:python/.env.python.local
+```