chore: comments and name change for dyno/image

heroku.Dockerfile

@@ -10,9 +10,11 @@ WORKDIR /home/indexer
 # Copy source code
 COPY . .
 
-# Install indexer
+# Install indexer and pin the version of poetry
 RUN pip3 install poetry==1.6.1
 RUN poetry install
+# the heroku.yml 'run' directive is incompatible with poetry
+# so we export to the requirements.txt format and use pip3 
 RUN poetry export --without-hashes --format=requirements.txt > requirements.txt
 RUN pip3 install -r requirements.txt 
 RUN yarnpkg install

heroku.yml

@@ -1,9 +1,9 @@
 build:
   docker:
-    index-regen: heroku.Dockerfile
+    indexer: heroku.Dockerfile
 run:
-  index-regen: python main.py
+  indexer: python main.py
 release:
-  image: index-regen
+  image: indexer
   command:
     - PGSSLMODE=no-verify yarnpkg migrate