message: README: Update service and agent usage text
diff: @@ -49,7 +49,8 @@ Start the service
  Ethereum
  --ethereum Ethereum node or provider URL [string] [required]
  - --mnemonic Ethereum wallet mnemonic [string] [required]
  + --mnemonic Mnemonic for the operator wallet [string] [required]
  + --indexer-address Ethereum address of the indexer [string] [required]
  Indexer Infrastructure
  --port Port to serve from [number] [default: 7600]
  @@ -58,10 +59,16 @@ Indexer Infrastructure
  --graph-node-status-endpoint Graph Node endpoint for indexing statuses etc.
  [string] [required]
  +Postgres
  + --postgres-host Postgres host [string] [required]
  + --postgres-port Postgres port [number] [default: 5432]
  + --postgres-username Postgres username [string] [default: "postgres"]
  + --postgres-password Postgres password [string] [default: ""]
  + --postgres-database Postgres database name [string] [required]
  +
  Network Subgraph
  - --network-subgraph-deployment Network subgraph deployment [string]
  --network-subgraph-endpoint Endpoint to query the network subgraph from
  - [string]
  + [string] [required]
  Options:
  --version Show version number [boolean]
  @@ -79,7 +86,8 @@ Start the agent
  Ethereum
  --ethereum Ethereum node or provider URL [string] [required]
  - --mnemonic Mnemonic for the wallet [string] [required]
  + --mnemonic Mnemonic for the operator wallet [string] [required]
  + --indexer-address Ethereum address of the indexer [string] [required]
  Indexer Infrastructure
  --graph-node-query-endpoint Graph Node endpoint for querying subgraphs
  @@ -121,7 +129,8 @@ Options:
  ## Running from source
  -Run the following at the root of this repository to install dependencies and build the packages:
  +Run the following at the root of this repository to install dependencies and
  +build the packages:
  ```sh
  yarn
  @@ -172,10 +181,7 @@ After this, the indexer agent and service can be run as follows:
  1. Indexer service:
  ```sh
  - docker run \
  - -p 7600:7600 \
  - -it indexer-service:latest \
  - ...
  + docker run -p 7600:7600 -it indexer-service:latest ...
  ```
  After this, the indexer service should be up and running at
  @@ -184,10 +190,7 @@ After this, the indexer agent and service can be run as follows:
  2. Indexer Agent
  ````sh
  - docker run \
  - -p 18000:8000 \
  - -it indexer-agent:latest \
  - ...
  + docker run -p 18000:8000 -it indexer-agent:latest ...
  ```
  This starts the indexer agent and serves the so-called indexer management API
  